Data Centers Atlas: Maryland

Permit and comment: Frederick County

Maryland Department of the Environment recorded public questions about Amazon's proposed generators, health, water, noise, construction and electricity in Frederick County. It made a final determination to issue the air permit effective March 25, 2026. That determination addresses the named air-permit procedure, not measured operating conditions or resolution of every concern.

Record status: resolved. Maryland Department of the Environment recorded a final determination effective March 25, 2026. Resolved applies only to that named air-permit determination. It does not establish actual operation, measured emissions, current compliance, all local approvals or resolution of every comment.

Event date: December 8, 2025

Source publication date: Not established

Disposition date: March 25, 2026

Concern sources checked: October 18, 2026

December 8, 2025 is the original documented public meeting date. March 25, 2026 is the separately stated effective final determination, not a source-check or invented hearing day. The first public posting of the packet is unknown. Meeting, application and effective determination dates are separate from publication; the current agency index does not supply a first posting day.

Raised or recorded by Maryland Department of the Environment.

Company statement published by an agency or court

Amazon stated in the agency-published response that it would use county water service, follow local requirements and use acoustic design measures. These are company positions and design expectations, not independently verified operating results or a response resolving every concern.

The agency packet explicitly presents additional Amazon responses for this application, including water and noise. This is an agency-published company statement; original first posting is unknown.

Response publication date: Not established

Response sources checked: October 18, 2026

Counts describe attributed documentation, not harm or severity. Allegations, procedural outcomes and published replies retain their separate scope.

Regulator record: Quantum Frederick

Maryland Department of the Environment recorded an inspection finding that required dust controls were not being implemented at Quantum Maryland and requested supporting compliance information. The company's consultant later described its controls and proposed further measures. This is an agency inspection record and a separate company response, not measured public exposure or a verified later closure.

Record status: unknown. The later agency compliance determination and present outcome are unknown in this bounded review. An information request, company description of controls and future monitoring commitments do not establish agency closure, measured exposure or current compliance.

Event date: March 28, 2025

Source publication date: Not established

Disposition date: Not established

Concern sources checked: October 18, 2026

March 28, 2025 is the inspection date explicitly recorded in the agency letter. April 7 is the information-request letter date; the later reply is dated April 29. First public posting of the agency letter and response is unknown. Their document dates are not substituted as publication days.

Raised or recorded by Maryland Department of the Environment.

Company statement published by an agency or court

Quantum Maryland stated through GEI Consultants that a water truck and monitoring program were present and described further dust-control measures. These are the company consultant's submitted account and commitments, not an independently verified agency clearance or measured public exposure.

GEI explicitly submitted the response on Quantum Maryland's behalf to answer the April 7 information request. The agency hosts the signed letter, dated April 29, 2025; first posting is unknown.

Response publication date: Not established

Response sources checked: October 18, 2026

Counts describe attributed documentation, not harm or severity. Allegations, procedural outcomes and published replies retain their separate scope.

Regulator record: Quantum Frederick

Maryland Department of the Environment notified Quantum Maryland that it was referring reported site violations for Attorney General enforcement. An earlier letter withdrew conditional approval of a utility-work environmental plan and cited unapproved work and groundwater discharge. These are historical agency actions, not a verified filed lawsuit, current campus shutdown or measured environmental harm.

Record status: unknown. The current enforcement disposition and status of the specific historical plan action are unknown in this bounded review. Referral does not establish a filed court case, awarded penalty, current shutdown or final compliance outcome. Later separately listed plan approvals do not by themselves resolve this record.

Event date: September 7, 2023

Source publication date: Not established

Disposition date: Not established

Concern sources checked: October 18, 2026

September 7, 2023 is stamped on the original referral notice. The earlier plan-withdrawal letter is dated May 25, and the company response is dated June 28. No later court filing or disposition day is inferred. First public posting of these documents is unknown. The company response is dated June 28, 2023 despite its May-looking filename; neither document date nor filename is substituted for publication.

Raised or recorded by Maryland Department of the Environment.

Company statement published by an agency or court

Quantum Maryland disputed the agency's factual and legal allegations and reported stopping dewatering and utility work while supplying further information. These are company statements, not independently adopted findings about water safety, compliance or the later enforcement referral.

The original company letter responds to the May 25 plan-withdrawal notice and is hosted by the agency. It is dated June 28, 2023 and predates the September referral; it is not an express answer to that later notice. First posting is unknown.

Response publication date: Not established

Response sources checked: October 18, 2026

Counts describe attributed documentation, not harm or severity. Allegations, procedural outcomes and published replies retain their separate scope.