{"schema_version":1,"layer":"air","reviewed_on":"2026-10-28","coverage_note":"Generator counts documented in selected permits, not a complete state or national count. A construction or operation permit does not prove equipment installation, operating hours, measured emissions or a data center opening.","items":[{"id":"air-sc-engine-exemption-context-20261025","kind":"permit_context","state_codes":["sc"],"subject":"South Carolina conditional engine construction exemption guidance","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded.","fields":{"sc_engine_exemption_basis":{"value":"Posted agency construction exemption engine clauses with separate facilitywide and federal review; source revisions preserved.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"status":{"value":"program","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"rated_gate":{"value":"ListB2i covers emergency or portable engines at or below150kW rated capacity; above150kW requires emergency use only, at most500hours per year for testing and maintenance and method recording actual hours such as hour meter. Rated capacity is not actual load.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"hours_boundary":{"value":"The500hour condition addresses testing and maintenance, not a claimed universal cap on all emergency operation or proof of actual runtime.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"remaining_duties":{"value":"Exemption list says other applicable requirements remain and emissions included for facility or project PSD, TitleV and MACT determinations; Department retains case specific permit authority. Not blanket campus approval.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"recordkeeping":{"value":"ListSectionB requires records; booklet says document exemption determination and maintain facilitywide potential evidence at facility for review. Exempt source does not mean no records.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"source_date_boundary":{"value":"Posted list revision December29,2022 and booklet revision April2025 are separate from October25,2026source check. No new2026rule effective date inferred; full current rules not independently reviewed.","source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded."},"issued_permit":{"value":null,"source_ids":["sc-air-current-exempt-list-20261025","sc-air-exemption-guide-20261025"],"locator":"Listpages1and5SectionB2i; bookletprinted4to8","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded.","unknown_reason":"No individual permit or exemption determination reviewed."}}},{"id":"air-egrid-state-2023-sc","subject":"South Carolina historical2023 electricity-generation emissions","kind":"emissions_context","state_codes":["sc"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","fields":{"status":{"value":"historical","source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 Data Year column"},"egrid_report_year":{"value":"2023","source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 YEAR column"},"egrid_state_fips":{"value":"45","source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 FIPSST column"},"egrid_state_basis":{"value":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 labels,codes,units and review scope"},"egrid_annual_net_generation":{"value":100853387.4,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STNGENAN (State annual net generation (MWh))","unit":"MWh","measurement_role":"reported_egrid_annual_net_generation","source_token":"100853387.40000001"},"egrid_annual_nox_emissions":{"value":12004.016,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STNOXAN (State annual NOx emissions (tons))","unit":"tons","measurement_role":"reported_egrid_annual_nox_emissions","source_token":"12004.016"},"egrid_annual_so2_emissions":{"value":8624.608,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STSO2AN (State annual SO2 emissions (tons))","unit":"tons","measurement_role":"reported_egrid_annual_so2_emissions","source_token":"8624.6080000000002"},"egrid_annual_co2_emissions":{"value":28096403.536,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STCO2AN (State annual CO2 emissions (tons))","unit":"tons","measurement_role":"reported_egrid_annual_co2_emissions","source_token":"28096403.535999998"},"egrid_nox_total_output_rate":{"value":0.238,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STNOXRTA (State annual NOx total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_nox_total_output_rate","source_token":"0.23799999999999999"},"egrid_so2_total_output_rate":{"value":0.171,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STSO2RTA (State annual SO2 total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_so2_total_output_rate","source_token":"0.17100000000000001"},"egrid_co2_total_output_rate":{"value":557.173,"source_ids":["epa-egrid2023-states-rev2"],"scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.","locator":"ST23 SC row 44, STCO2RTA (State annual CO2 total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_co2_total_output_rate","source_token":"557.173"},"egrid_annual_ch4_emissions_lb":{"value":4866720.881,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STCH4AN (State annual CH4 emissions (lbs))","unit":"lbs","measurement_role":"reported_egrid_annual_ch4_emissions","source_token":"4866720.8810000001"},"egrid_annual_co2e_emissions":{"value":28257228.395,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STCO2EQA (State annual CO2 equivalent emissions (tons))","unit":"tons","measurement_role":"reported_egrid_annual_co2e_emissions","source_token":"28257228.395"},"egrid_annual_n2o_emissions_lb":{"value":699552.946,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STN2OAN (State annual N2O emissions (lbs))","unit":"lbs","measurement_role":"reported_egrid_annual_n2o_emissions","source_token":"699552.946"},"egrid_ozone_season_nox_total_output_rate":{"value":0.269,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STNOXRTO (State ozone season NOx total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_ozone_season_nox_total_output_rate","source_token":"0.26900000000000002"},"egrid_extended_basis":{"value":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. 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No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 field labels,report year and annual-versus-ozone-season units"},"egrid_ozone_season_nox_emissions":{"value":5978.37,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STNOXOZ (State ozone season NOx emissions (tons))","unit":"tons","measurement_role":"reported_egrid_ozone_season_nox_emissions","source_token":"5978.37"},"egrid_co2e_total_output_rate":{"value":560.363,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STC2ERTA (State annual CO2 equivalent total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_co2e_total_output_rate","source_token":"560.36300000000006"},"egrid_ch4_total_output_rate":{"value":0.048,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STCH4RTA (State annual CH4 total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_ch4_total_output_rate","source_token":"4.8000000000000001E-2"},"egrid_n2o_total_output_rate":{"value":0.007,"source_ids":["epa-egrid2023-states-rev2"],"scope":"Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.","locator":"ST23 SC row 44, STN2ORTA (State annual N2O total output emission rate (lb/MWh))","unit":"lb per MWh","measurement_role":"reported_egrid_n2o_total_output_rate","source_token":"7.0000000000000001E-3"}}},{"id":"air-eia-state-emissions-2025-sc","kind":"emissions_context","subject":"South Carolina historical power and useful thermal emissions2025 and2024","state_codes":["sc"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","fields":{"status":{"value":"historical","source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 years2025 and2024"},"eia_emissions_basis":{"value":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 header and methodological notes"},"eia_emissions_co2_2025":{"value":27905.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;co2;Year 2025","source_token":"27,905","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"},"eia_emissions_co2_2024":{"value":26896.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;co2;Year 2024","source_token":"26,896","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"},"eia_emissions_so2_2025":{"value":16.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;so2;Year 2025","source_token":"16","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"},"eia_emissions_so2_2024":{"value":19.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;so2;Year 2024","source_token":"19","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"},"eia_emissions_nox_2025":{"value":15.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;nox;Year 2025","source_token":"15","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"},"eia_emissions_nox_2024":{"value":16.0,"source_ids":["eia-epa2025-state-emissions"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.","locator":"Table9.5 South Carolina row;nox;Year 2024","source_token":"16","unit":"thousand metric tons","measurement_role":"agency_estimated_generation_and_useful_thermal_emissions"}}}],"sources":{"sc-air-current-exempt-list-20261025":{"url":"https://www.des.sc.gov/sites/des/files/Documents/BAQ/Permitting%20Guidance/Exempt_List.pdf","title":"South Carolina posted air exemption list","publisher":"South Carolina Department of Environmental Services","published_on":null,"date_note":"Printed revision December29,2022.","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded.","checked_at":"2026-10-25T10:09:09.532354+00:00","sha256":"1294a22d327bfd7dbdff53da73e45c52f8718da26d66a96f804163d20bd3f5b9","tier":"A","establishes_status":["program"]},"sc-air-exemption-guide-20261025":{"url":"https://des.sc.gov/sites/des/files/Library/CR-010877.pdf","title":"South Carolina air exemption guidance booklet","publisher":"South Carolina Department of Environmental Services","published_on":null,"date_note":"Printed revision04/25; exactday unknown.","scope":"Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded.","checked_at":"2026-10-25T10:04:14.380697+00:00","sha256":"09fd6defba1b44026d552771d5ce9251cf791ab42d038d3bf1f4e1f104ff5a89","tier":"A","establishes_status":["program"]},"epa-egrid2023-states-rev2":{"url":"https://www.epa.gov/system/files/documents/2025-06/egrid2023_data_rev2.xlsx","title":"EPA eGRID2023 revision2 original workbook ST23 state emissions,generation and total output rates","publisher":"U.S. Environmental Protection Agency","published_on":null,"date_note":"Exact workbook publication day not established;2025-06 path is a storage folder,not an exact publication date.2023 is report year,not retrieval year.","checked_at":"2026-10-27T21:05:24.064631+00:00","sha256":"895cd81dd8662406189ad8adf5a2578dcb362cdb5cff7cca81b10ee6bd2447c6","raw_path":"/Users/shaunwilson/Documents/Data Centers Atlas/build/cache/layers-20261023/epa-egrid2023-data-rev2.bin","tier":"A","scope":"EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Download index identifies eGRID2023 revision2;only workbook metadata/shared strings/ST23 entries read,no whole-archive extraction.","establishes_status":["historical"]},"eia-epa2025-state-emissions":{"url":"https://www.eia.gov/electricity/annual/table.php?t=epa_09_05.html","publisher":"U.S. Energy Information Administration","title":"Electric Power Annual Table9.5 state power and CHP emissions2025 and2024","published_on":"2026-10-21","checked_at":"2026-10-28T02:40:42.051795+00:00","sha256":"36e6dbf2164041a56f6985a5fcac8357791d95eb82545bfc542aea095c38d5dd","raw_path":"/Users/shaunwilson/Documents/Data Centers Atlas/build/cache/layers-20261023/eia-epa2025-state-emissions-20261028.html","tier":"A","establishes_status":["historical"],"scope":"EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins."}},"details":[{"id":"air-sc-engine-exemption-context-20261025","html":"

South Carolina conditional engine construction exemption guidance

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded.

Sc engine exemption basis
Posted agency construction exemption engine clauses with separate facilitywide and federal review; source revisions preserved.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Status
programSouth Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Rated gate
ListB2i covers emergency or portable engines at or below150kW rated capacity; above150kW requires emergency use only, at most500hours per year for testing and maintenance and method recording actual hours such as hour meter. Rated capacity is not actual load.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Hours boundary
The500hour condition addresses testing and maintenance, not a claimed universal cap on all emergency operation or proof of actual runtime.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Remaining duties
Exemption list says other applicable requirements remain and emissions included for facility or project PSD, TitleV and MACT determinations; Department retains case specific permit authority. Not blanket campus approval.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Recordkeeping
ListSectionB requires records; booklet says document exemption determination and maintain facilitywide potential evidence at facility for review. Exempt source does not mean no records.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Source date boundary
Posted list revision December29,2022 and booklet revision April2025 are separate from October25,2026source check. No new2026rule effective date inferred; full current rules not independently reviewed.South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

Issued permit
Not establishedSouth Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026. South Carolina Department of Environmental Services. Source: Publication date not stated. Checked: October 25, 2026.

Posted2022listpages1,5,6text and page5engine clause visually reviewed;2025bookletPDFpages8through12 read. Fullrules and individual engines not reviewed; ambiguous booklet emission level sentence excluded. Locator: Listpages1and5SectionB2i; bookletprinted4to8.

"},{"id":"air-egrid-state-2023-sc","html":"

South Carolina historical2023 electricity-generation emissions

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.

Status
historicalU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 Data Year column.

Egrid report year
2023U.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 YEAR column.

Egrid state fips
45U.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 FIPSST column.

Egrid state basis
EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence.U.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 labels,codes,units and review scope.

Egrid annual net generation
100853387.40 MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STNGENAN (State annual net generation (MWh)).

Egrid annual nox emissions
12004.02 tonsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STNOXAN (State annual NOx emissions (tons)).

Egrid annual so2 emissions
8624.61 tonsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STSO2AN (State annual SO2 emissions (tons)).

Egrid annual co2 emissions
28096403.54 tonsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STCO2AN (State annual CO2 emissions (tons)).

Egrid nox total output rate
0.24 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STNOXRTA (State annual NOx total output emission rate (lb/MWh)).

Egrid so2 total output rate
0.17 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STSO2RTA (State annual SO2 total output emission rate (lb/MWh)).

Egrid co2 total output rate
557.17 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

EPA eGRID2023 revision2 state electricity-generation emissions context,ST23 worksheet. Historical2023,not current2026 conditions or data center facility emissions. Annual NOx,SO2 andCO2 totals in source tons are distinct from source-reported total output rates in lb/MWh;CO2 is not CO2 equivalent. Annual net generation is MWh,not installed capacity or customer use. Rates are not marginal emissions,ambient concentrations,health effects or emissions factors allocated to a data center. No tons-to-tonnes conversion,rate recomputation,facility join or causal data center inference. State generation context does not establish the mix delivered to consumers. Puerto Rico source row is outside this51state/DC review,not absence. Locator: ST23 SC row 44, STCO2RTA (State annual CO2 total output emission rate (lb/MWh)).

Egrid annual ch4 emissions lb
4866720.88 lbsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STCH4AN (State annual CH4 emissions (lbs)).

Egrid annual co2e emissions
28257228.39 tonsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STCO2EQA (State annual CO2 equivalent emissions (tons)).

Egrid annual n2o emissions lb
699552.95 lbsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STN2OAN (State annual N2O emissions (lbs)).

Egrid ozone season nox total output rate
0.27 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STNOXRTO (State ozone season NOx total output emission rate (lb/MWh)).

Egrid extended basis
Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference.U.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 field labels,report year and annual-versus-ozone-season units.

Egrid ozone season nox emissions
5978.37 tonsU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STNOXOZ (State ozone season NOx emissions (tons)).

Egrid co2e total output rate
560.36 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STC2ERTA (State annual CO2 equivalent total output emission rate (lb/MWh)).

Egrid ch4 total output rate
0.05 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STCH4RTA (State annual CH4 total output emission rate (lb/MWh)).

Egrid n2o total output rate
0.01 lb per MWhU.S. Environmental Protection Agency. Source: Publication date not stated. Checked: October 27, 2026.

Historical2023 EPA eGRID ST23 source-reported CH4,N2O,CO2 equivalent and ozone-season NOx context. Annual CH4/N2O totals are source lbs;CO2 equivalent total is source tons;total output rates are lb/MWh. CO2 equivalent differs from raw CO2; no global-warming-potential factor assumed or recomputed,no pounds/tons/metric-tonne conversion. Source-defined ozone-season NOx is not full-year NOx or an ambient ozone concentration. Annual and seasonal rates and totals remain separate,not summed across scopes. No marginal,facility,health-risk or attributable data center emissions inference. Locator: ST23 SC row 44, STN2ORTA (State annual N2O total output emission rate (lb/MWh)).

"},{"id":"air-eia-state-emissions-2025-sc","html":"

South Carolina historical power and useful thermal emissions2025 and2024

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.

Status
historicalU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 years2025 and2024.

Eia emissions basis
EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins.U.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 header and methodological notes.

Eia emissions co2 2025
27905.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;co2;Year 2025.

Eia emissions co2 2024
26896.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;co2;Year 2024.

Eia emissions so2 2025
16.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;so2;Year 2025.

Eia emissions so2 2024
19.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;so2;Year 2024.

Eia emissions nox 2025
15.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;nox;Year 2025.

Eia emissions nox 2024
16.00 thousand metric tonsU.S. Energy Information Administration. Source: October 21, 2026. Checked: October 28, 2026.

EIA Table9.5 historical state2025 and2024 emissions estimates from energy consumption at conventional power and combined-heat-and-power plants. Includes electricity generation AND production of useful thermal output,not electricity-only emissions. Source unit is thousand metric tons,not eGRID source tons,pounds,CO2equivalent or emission intensity. Source CO2,SO2 and NOx are distinct pollutants,not summed as one climate measure. Displayed zero values may represent small values rounded to zero;no absence or zero-emissions certification. Retain displayed HTML precision;source says Excel cells provide additional precision,not adopted here. No direct eGRID trend or data center allocation,marginal emissions,ambient concentration,health risk,permit compliance,current2026 activity or Native facility joins. Locator: Table9.5 South Carolina row;nox;Year 2024.

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