Clean Water Act discharge permit · NPDES AZ0025577
CITY OF TOMBSTONE - WWTP, Tombstone, AZ: NPDES AZ0025577 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
CITY OF TOMBSTONE - WWTP, held by City Of Tombstone, holds NPDES permit AZ0025577. EPA’s file records it issued March 26, 2021 and expiring March 25, 2026. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CITY OF TOMBSTONE - WWTP |
|---|---|
| Permittee as filed | City Of Tombstone |
| NPDES ID | AZ0025577 |
| 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 | March 26, 2021 |
| Expiration date | March 25, 2026 |
| Address | Tombstone, AZ 85638 |
| Subwatershed | Walnut Gulch (HUC 150502020607) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 17With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| E. coli, colony forming units [CFU] | 3 | 50 | 39 | October 31, 2024 | 1,805% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 25 | 8 | November 30, 2023 | 165% over the limit |
| Chlorine, total residual | 5 | 25 | 6 | November 30, 2012 | 538% over the limit |
| Solids, total suspended | 7 | 42 | 5 | October 31, 2021 | 267% over the limit |
| pH | 4 | 21 | 5 | December 31, 2020 | |
| Solids, suspended percent removal | 1 | 9 | 4 | October 31, 2021 | 453% over the limit |
| BOD, 5-day, 20 deg. C | 7 | 33 | 2 | December 31, 2023 | 20% over the limit |
| Zinc, total recoverable | 5 | 3 | 1 | June 30, 2024 | 10% over the limit |
| Temperature, water deg. centigrade | 3 | 15 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| Chromium, total recoverable | 3 | 6 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 3 | 6 | 0 | ||
| Iron, total recoverable | 1 | 5 | 0 | ||
| BOD, 5-day, percent removal | 1 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 3 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 3 | 0 | ||
| Phosphorus, total [as P] | 1 | 3 | 0 | ||
| Oil & Grease | 4 | 0 | 0 | ||
| Cyanide, total [as CN] | 3 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 3 | 0 | 0 | ||
| Selenium, total recoverable | 3 | 0 | 0 | ||
| Silver total recoverable | 3 | 0 | 0 | ||
| Lead, total recoverable | 3 | 0 | 0 | ||
| Copper, total recoverable | 3 | 0 | 0 | ||
| Mercury, total recoverable | 3 | 0 | 0 | ||
| Sulfide, total [as S] | 2 | 0 | 0 | ||
| Hydrogen sulfide | 2 | 0 | 0 | ||
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | 2 | 0 | 0 | ||
| Static 7Day Chronic Pimephales Promelas | 2 | 0 | 0 | ||
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| Solids, total dissolved | 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 AZ0025577.
Inspections
EPA’s inspection file holds no inspection for NPDES AZ0025577.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES AZ0025577.
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
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Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 AZ0025577 there.
CITY OF TOMBSTONE - WWTP, Tombstone, Arizona: Individual permit AZ0025577, held by City Of Tombstone; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 26, 2021, term to March 25, 2026.
- E. coli, colony forming units [CFU]: 3 limits, 50 violations of any kind, 39 effluent exceedances, latest October 31, 2024, largest 1,805% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 25 violations of any kind, 8 effluent exceedances, latest November 30, 2023, largest 165% over the limit.
- Chlorine, total residual: 5 limits, 25 violations of any kind, 6 effluent exceedances, latest November 30, 2012, largest 538% over the limit.
- Solids, total suspended: 7 limits, 42 violations of any kind, 5 effluent exceedances, latest October 31, 2021, largest 267% over the limit.
- pH: 4 limits, 21 violations of any kind, 5 effluent exceedances, latest December 31, 2020.
- Solids, suspended percent removal: 1 limit, 9 violations of any kind, 4 effluent exceedances, latest October 31, 2021, largest 453% over the limit.
- BOD, 5-day, 20 deg. C: 7 limits, 33 violations of any kind, 2 effluent exceedances, latest December 31, 2023, largest 20% over the limit.
- Zinc, total recoverable: 5 limits, 3 violations of any kind, 1 effluent exceedance, latest June 30, 2024, largest 10% over the limit.
- Temperature, water deg. centigrade: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Chromium, total recoverable: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Chromium, hexavalent dissolved [as Cr]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Iron, total recoverable: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, percent removal: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [as N]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Nitrite + Nitrate total [as N]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Oil & Grease: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Cyanide, total [as CN]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, total recoverable: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Silver total recoverable: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, total recoverable: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, total recoverable: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, total recoverable: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Sulfide, total [as S]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Hydrogen sulfide: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum): 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Static 7Day Chronic Pimephales Promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- TU Static Renewal 7-Day Chronic Ceriodaphnia dubia: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, total recoverable: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Thallium, total recoverable: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Beryllium, total recoverable [as Be]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total recoverable: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, total recoverable: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Antimony, total recoverable: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Arizona holds 91 Publicly owned treatment works coverages of this permit type in EPA’s file; 61 were issued before AZ0025577.
Coverages issued nearest AZ0025577
- March 26, 2020: GILA BEND - WWTP, Gila Bend, AZ0020231, held by Town Of Gila Bend
- April 28, 2020: TOWN OF PATAGONIA - WWTP, Patagonia, AZ0025011, held by Town Of Patagonia
- September 28, 2020: CITY OF GOODYEAR - CORGETT WASH WRF, Goodyear, AZ0023582, held by City Of Goodyear
- December 11, 2020: CITY OF TOLLESON - WWTP, Tolleson, AZ0020338, held by City Of Tolleson
- February 2, 2021: PIMA COUNTY - WWMD - GREEN VALLEY BNRO - WWTP, Sahuarita, AZ0024937, held by Pima County - Regional Wastewater Reclamation Department
- June 1, 2021: CITY OF WINSLOW - WWTP, Winslow, AZ0026310, held by City Of Winslow
- August 19, 2021: FESTIVAL RANCH WATER RECLAMATION FACILITY, Buckeye, AZ0025216, held by City Of Buckeye - Water Resources Administration
- August 26, 2021: VIRGIN RIVER DWID WWTP, Littlefield, AZ0023655, held by Virgin River Domestic Wastewater Improvement District
- October 20, 2021: SECTION 10 WWTP, Bullhead City, AZ0026808, held by City Of Bullhead City
- November 1, 2021: TUCSON AIRPORT REMEDIATION PROJECT - CO-MINGLED PLUME, Tucson, AZ0026417, held by City Of Tucson - Water
CITY OF TOMBSTONE - WWTP among its neighbors
EPA’s permit file holds 1 discharge permits in the Walnut Gulch subwatershed (HUC 150502020607), AZ0025577 among them. Its county holds 30, 2 of them major permits; AZ0025577 is a minor permit.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.