Clean Air Act stationary source · ICIS-AIR AZMCA004013X001075
91ST AVE WASTEWATER TREATMENT PLANT, Maricopa County, AZ: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Synthetic minor sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 7Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
91ST AVE WASTEWATER TREATMENT PLANT, at 5615 S 91ST AVE SUITE 1, Maricopa County in Maricopa County, Arizona, is an operating synthetic minor 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 filed | 91ST AVE WASTEWATER TREATMENT PLANT |
|---|---|
| ICIS-AIR ID | AZMCA004013X001075 |
| EPA facility registry ID | 110000510144 |
| Operating status | Operating |
| Emissions classification | Synthetic minor source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 5615 S 91ST AVE SUITE 1, Maricopa County, AZ 85353 |
| County | Maricopa County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Utilities (NAICS 2213) |
| EPA region | 09 |
| Local air agency | Maricopa 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 91ST AVE WASTEWATER TREATMENT PLANT 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
- 7Evaluations since January 1, 2017
- 3Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| August 7, 2026 | PCE Off-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; 40 CFR Part 63 Area Sources; New Source Performance Standards (Non-Major); State or Local rule or regulation that is not federally-enforceable |
| February 23, 2026 | FCE On-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; 40 CFR Part 63 Area Sources; New Source Performance Standards (Non-Major); State or Local rule or regulation that is not federally-enforceable |
| August 13, 2025 | PCE Off-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable |
| March 11, 2025 | PCE Off-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable |
| November 1, 2024 | PCE Off-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable |
| May 22, 2024 | FCE On-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable |
| April 21, 2022 | FCE On-Site | Local | Federally-Enforceable State Operating Permit - Non Title V; MACT Standards (40 CFR Part 63); New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable |
Violations
- 2Violation determinations since January 1, 2017
- 0Of them high-priority
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.
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| July 14, 2022 | Earliest FRV determination | Local | Federally-Enforceable State Operating Permit - Non Title V |
| July 13, 2022 | Earliest FRV determination | Local | Federally-Enforceable State Operating Permit - Non Title V |
Enforcement and penalties
0 formal enforcement actions since January 1, 2017, 0 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.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| July 14, 2022 | Warning Letter | Local |
| July 13, 2022 | Warning Letter | Local |
Stack tests
- 0Stack tests since January 1, 2017
- 0Recorded as failed
EPA’s stack test file holds no test at ICIS-AIR AZMCA004013X001075 since January 1, 2017.
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 110000510144 there.
Nearby on the register
- Air-emissions sources in Maricopa County
- Every source record in Maricopa County, A to Z
- Air-emissions sources in Arizona
- Every source record in Arizona, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.