Clean Water Act discharge permit · NPDES AZ0023159
APS - WEST PHOENIX POWER PLANT, Phoenix, AZ: NPDES AZ0023159 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 21Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
APS - WEST PHOENIX POWER PLANT, held by Aps-West Phoenix Power Plant, holds NPDES permit AZ0023159. EPA’s file records it issued April 8, 2020 and expiring April 7, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | APS - WEST PHOENIX POWER PLANT |
|---|---|
| Permittee as filed | Aps-West Phoenix Power Plant |
| NPDES ID | AZ0023159 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 8, 2020 |
| Expiration date | April 7, 2025 |
| Address | Phoenix, AZ 85043 |
| Subwatershed | Town of Santa Maria-Salt River (HUC 150601060306) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 21Pollutants on file
- 21Under a numeric limit
- 3With a violation of any kind
- 1With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 2 | 2 | December 31, 2025 | 13% over the limit |
| pH | 6 | 20 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 18 | 0 | ||
| Oil & Grease | 3 | 0 | 0 | ||
| Boron, total recoverable | 3 | 0 | 0 | ||
| Zinc, total recoverable | 3 | 0 | 0 | ||
| Chromium, total recoverable | 3 | 0 | 0 | ||
| Chlorine, free available | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 1 | 0 | 0 | ||
| Cyanide, total [as CN] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 0 | 0 | ||
| Mercury, total recoverable | 1 | 0 | 0 | ||
| Chemical Oxygen Demand [COD] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AZ0023159.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, AZ0023159.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID AZ0023159 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.