Clean Water Act discharge permit · NPDES AZ0025011
TOWN OF PATAGONIA - WWTP, Patagonia, AZ: NPDES AZ0025011 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 39Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
TOWN OF PATAGONIA - WWTP, held by Town Of Patagonia, holds NPDES permit AZ0025011. EPA’s file records it issued April 28, 2020 and expiring April 27, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TOWN OF PATAGONIA - WWTP |
|---|---|
| Permittee as filed | Town Of Patagonia |
| NPDES ID | AZ0025011 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 28, 2020 |
| Expiration date | April 27, 2025 |
| Address | Patagonia, AZ 85624 |
| Subwatershed | Middle Sonoita Creek (HUC 150503010206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 40Pollutants on file
- 39Under a numeric limit
- 28With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 5 | 15 | 15 | July 31, 2012 | 456% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 5 | 5 | January 31, 2021 | 1,260% over the limit |
| Selenium, total recoverable | 5 | 5 | 4 | June 30, 2016 | 150% over the limit |
| Solids, suspended percent removal | 1 | 1 | 1 | July 31, 2019 | 27% over the limit |
| Boron, total recoverable | 5 | 3 | 0 | ||
| Iron, total recoverable | 3 | 3 | 0 | ||
| pH | 6 | 2 | 0 | ||
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | 2 | 2 | 0 | ||
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| TU Static Renewal 7-Day Chronic Pimphales promelas | 0 | 2 | 0 | ||
| Copper, total recoverable | 5 | 1 | 0 | ||
| Oil & Grease | 3 | 1 | 0 | ||
| Cyanide, total [as CN] | 3 | 1 | 0 | ||
| Sulfide, total [as S] | 3 | 1 | 0 | ||
| Thallium, total recoverable | 3 | 1 | 0 | ||
| Chromium, total recoverable | 3 | 1 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 3 | 1 | 0 | ||
| Hydrogen sulfide | 3 | 1 | 0 | ||
| Mercury, total recoverable | 3 | 1 | 0 | ||
| Phosphorus, total [as P] | 1 | 1 | 0 | ||
| Arsenic, total recoverable | 1 | 1 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 1 | 0 | ||
| Nickel, total recoverable | 1 | 1 | 0 | ||
| Silver total recoverable | 1 | 1 | 0 | ||
| Zinc, total recoverable | 1 | 1 | 0 | ||
| Cadmium, total recoverable | 1 | 1 | 0 | ||
| Lead, total recoverable | 1 | 1 | 0 | ||
| Antimony, total recoverable | 1 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 7 | 0 | 0 | ||
| Solids, total suspended | 7 | 0 | 0 | ||
| Temperature, water deg. centigrade | 3 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 3 | 0 | 0 | ||
| E. coli, colony forming units [CFU] | 3 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Static 7Day Chronic Pimephales Promelas | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 0 | 0 | ||
| BOD, 5-day, percent removal | 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 AZ0025011.
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, AZ0025011.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 AZ0025011 there.
Nearby on the register
- Discharge permits in Patagonia
- Every permit record in Patagonia, A to Z
- Discharge permits in Arizona
- Every permit record in Arizona, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.