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Clean Air Act stationary source · ICIS-AIR AZMCA004013X044186

MESQUITE GENERATING STATION, Maricopa County, AZ: Clean Air Act compliance record, inspections, violations, penalties

MESQUITE GENERATING STATION, at 37625 W ELLIOT RD, Maricopa County in Maricopa County, Arizona, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. Maricopa County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.

Identity

Facility as filedMESQUITE GENERATING STATION
ICIS-AIR IDAZMCA004013X044186
EPA facility registry ID110012547431
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
Address37625 W ELLIOT RD, Maricopa County, AZ 85322
CountyMaricopa County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Utilities (NAICS 2211)
SIC code4911
EPA region09
Local air agencyMaricopa County Air Pollution Control Agency (Grantee)

Cited to the EPA ICIS-AIR facility file (ECHO download).

Programs and pollutants

Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs MESQUITE GENERATING STATION is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
August 11, 2026PCE Off-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 22, 2026PCE Off-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 22, 2026PCE Off-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 1, 2025PCE Off-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 11, 2025PCE Off-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 26, 2025FCE On-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 4, 2025PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
October 16, 2024FCE On-SiteLocalAcid Rain Deposition Control (CAA Title IV); Stratospheric Ozone Protection; Federal Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; The Mandatory Greenhouse Gas Reporting Rule; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements; State or Local rule or regulation that is not federally-enforceable; Prevention of Accidental Release/General Duty Clause; Prevention of Significant Deterioration of Air Quality; Risk Management Program; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
October 4, 2024PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
July 5, 2024PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
November 6, 2023FCE On-SiteLocalAcid Rain Deposition Control (CAA Title IV); MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; Prevention of Significant Deterioration of Air Quality; Title V Permits
July 14, 2022PCE On-SiteLocalAcid Rain Deposition Control (CAA Title IV); MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; Prevention of Significant Deterioration of Air Quality; Title V Permits
June 1, 2022FCE On-SiteLocalAcid Rain Deposition Control (CAA Title IV); MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; Prevention of Significant Deterioration of Air Quality; Title V Permits
March 23, 2022PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
September 21, 2021FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 30, 2020PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 30, 2020FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 28, 2019PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 28, 2019FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 16, 2018PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
August 16, 2018FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 8, 2018PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
January 8, 2018FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 14, 2017FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 14, 2017PCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.

DateWhat EPA recordedAgencyPrograms
May 8, 2025Earliest FRV determinationLocalPrevention of Significant Deterioration of Air Quality
July 19, 2024Earliest FRV determinationLocalTitle V Permits
March 29, 2022Earliest FRV determinationLocalPrevention of Significant Deterioration of Air Quality; Title V Permits

Enforcement and penalties

3 formal enforcement actions since January 1, 2017, 1 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.

DateWhat EPA recordedAgencyPenalty, as filed
May 21, 2025Administrative OrderLocal$0
August 7, 2024Administrative OrderLocal$1,686
April 12, 2022Administrative OrderLocal$0

Informal enforcement

DateWhat EPA recordedAgency
April 25, 2025Notice of ViolationLocal
July 19, 2024Notice of ViolationLocal
March 31, 2022Notice of ViolationLocal

Stack tests

DateWhat EPA recordedAgency
July 21, 2026PassLocal
May 8, 2026PassLocal
May 9, 2025PassLocal
April 12, 2024PassLocal
April 13, 2023PendingLocal
May 18, 2022PassLocal
May 21, 2021PassLocal
February 11, 2021PassState
April 21, 2020PassLocal
June 20, 2019PendingLocal

Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110012547431 there.

Nearby on the register

Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.