NPDES AZ0025160 · Clean Water Act
USDOI BR - HOOVER DAM WWTP, Boulder City, NV: NPDES AZ0025160 discharge permit, effluent exceedances, inspections, penalties
USDOI BR - HOOVER DAM WWTP, Boulder City, Nevada: Individual permit AZ0025160, held by Usdoi - Lower Colorado; Publicly owned treatment works; Administratively continued; issued August 2, 2019, term to August 1, 2024.
24 of the 39 pollutants listed for NPDES AZ0025160 have no violation or effluent exceedance.
- Solids, total dissolved: 7 limits, 18 violations of any kind, 12 effluent exceedances, latest June 30, 2019, largest 63% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 5 violations of any kind, 3 effluent exceedances, latest April 30, 2026, largest 45% over the limit.
- Solids, total suspended: 7 limits, 2 violations of any kind, 2 effluent exceedances, latest March 31, 2017, largest 3% over the limit.
- Iron, total recoverable: 5 limits, 2 violations of any kind, 2 effluent exceedances, latest December 31, 2022, largest 59% over the limit.
- E. coli, colony forming units [CFU]: 3 limits, 2 violations of any kind, 2 effluent exceedances, latest December 31, 2023, largest 561% over the limit.
- Copper, total recoverable: 1 limit, 2 violations of any kind, 2 effluent exceedances, latest December 31, 2015, largest 58% over the limit.
- Nitrogen, nitrate total [as NO3]: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest June 30, 2015, largest 4,700% over the limit.
- Selenium, total recoverable: 5 limits, 1 violation of any kind, 1 effluent exceedance, latest June 30, 2026, largest 110% over the limit.
- Chlorine, total residual: 5 limits, 1 violation of any kind, 1 effluent exceedance, latest October 31, 2019, largest 11% over the limit.
- Solids, suspended percent removal: 1 limit, 1 violation of any kind, 1 effluent exceedance, latest May 31, 2020, largest 4% over the limit.
- Sulfide, total [as S]: 2 limits, 2 violations of any kind.
- Hydrogen sulfide: 2 limits, 2 violations of any kind.
- Nitrogen, Kjeldahl, total [as N]: 1 limit, 2 violations of any kind.
- Nitrite + Nitrate total [as N]: 1 limit, 2 violations of any kind.
- Phosphorus, total [as P]: 1 limit, 2 violations of any kind.
- BOD, 5-day, 20 deg. C: 7 limits.
- pH: 6 limits.
- Oil & Grease: 5 limits.
- Lead, total recoverable: 5 limits.
- Mercury, total recoverable: 5 limits.
- Flow, in conduit or thru treatment plant: 4 limits.
- Temperature, water deg. centigrade: 3 limits.
- Cyanide, total [as CN]: 3 limits.
- Hardness, total [as CaCO3]: 3 limits.
- TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum): 2 limits.
- Static 7Day Chronic Pimephales Promelas: 2 limits.
- TU Static Renewal 7-Day Chronic Ceriodaphnia dubia: 2 limits.
- Oxygen, dissolved [DO]: 1 limit.
- Arsenic, total recoverable: 1 limit.
- Thallium, total recoverable: 1 limit.
- Beryllium, total recoverable [as Be]: 1 limit.
- Nickel, total recoverable: 1 limit.
- Silver total recoverable: 1 limit.
- Zinc, total recoverable: 1 limit.
- Cadmium, total recoverable: 1 limit.
- Chromium, total recoverable: 1 limit.
- Chromium, hexavalent dissolved [as Cr]: 1 limit.
- Antimony, total recoverable: 1 limit.
- BOD, 5-day, percent removal: 1 limit.
- October 8, 2026: Notice of Violation (State).
- October 6, 2026: Effluent Violations - Numeric effluent violation (ST6).
- September 15, 2026: Notice of Violation (State).
- September 14, 2026: Effluent Violations - Numeric effluent violation (ST6).
- September 14, 2026: Notice of Violation (State).
- August 10, 2026: Notice of Violation (State).
- August 5, 2026: Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements (ST6).
- August 5, 2026: Effluent Violations - Numeric effluent violation (ST6).
- July 27, 2026: No Further Action (State).
- June 19, 2026: Notice of Violation (State).
- June 18, 2026: Effluent Violations - Numeric effluent violation (ST6).
Nevada holds 23 Publicly owned treatment works coverages of this permit type in EPA’s file; 13 were issued before AZ0025160.
Coverages issued nearest AZ0025160
- 2011-07-15: KURT R. SEGLER WATER RECLAMATION FACILITY, Henderson: NV0022098, held by CITY OF HENDERSON
- 2011-08-04: FALLON WASTEWATER TREATMENT PLANT, Fallon: NV0020061, held by CITY OF FALLON
- 2012-06-28: VIRGINIA CITY WASTEWATER TREATMENT PLANT, Virginia City: NV0020451, held by STOREY COUNTY PUBLIC WORKS
- 2013-04-25: LAUGHLIN WATER RESOURCE CENTER (LWRC), Laughlin: NV0021563, held by CLARK COUNTY WATER RECLAMATION
- 2015-11-30: MOODY LANE REGIONAL WATER RECLAMATION FACILITY, Fallon: NV0023582, held by CHURCHILL COUNTY
USDOI BR - HOOVER DAM WWTP among its neighbors
1 discharge permits are in the White Rock Canyon-Colorado River subwatershed (HUC 150301010101); AZ0025160 is one.
Identity
| Facility | USDOI BR - HOOVER DAM WWTP |
|---|---|
| Permittee | Usdoi - Lower Colorado |
| NPDES ID | AZ0025160 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Federal facility |
| Program | Publicly owned treatment works |
| Issued | August 2, 2019 |
| Expires | August 1, 2024 |
| Address | Boulder City, NV 89005 |
| Subwatershed | White Rock Canyon-Colorado River (HUC 150301010101) |
NPDES AZ0025160: effluent limits and exceedances
USDOI BR - HOOVER DAM WWTP (NPDES AZ0025160): 39 pollutants on file, 38 limited; 15 with a violation of any kind, 10 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Solids, total dissolved | 7 | 18 | 12 | June 30, 2019 | 63% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 5 | 3 | April 30, 2026 | 45% over the limit |
| Solids, total suspended | 7 | 2 | 2 | March 31, 2017 | 3% over the limit |
| Iron, total recoverable | 5 | 2 | 2 | December 31, 2022 | 59% over the limit |
| E. coli, colony forming units [CFU] | 3 | 2 | 2 | December 31, 2023 | 561% over the limit |
| Copper, total recoverable | 1 | 2 | 2 | December 31, 2015 | 58% over the limit |
| Nitrogen, nitrate total [as NO3] | 0 | 2 | 2 | June 30, 2015 | 4,700% over the limit |
| Selenium, total recoverable | 5 | 1 | 1 | June 30, 2026 | 110% over the limit |
| Chlorine, total residual | 5 | 1 | 1 | October 31, 2019 | 11% over the limit |
| Solids, suspended percent removal | 1 | 1 | 1 | May 31, 2020 | 4% over the limit |
| Sulfide, total [as S] | 2 | 2 | 0 | ||
| Hydrogen sulfide | 2 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 2 | 0 | ||
| Phosphorus, total [as P] | 1 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 7 | 0 | 0 | ||
| pH | 6 | 0 | 0 | ||
| Oil & Grease | 5 | 0 | 0 | ||
| Lead, total recoverable | 5 | 0 | 0 | ||
| Mercury, total recoverable | 5 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Temperature, water deg. centigrade | 3 | 0 | 0 | ||
| Cyanide, total [as CN] | 3 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 3 | 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 | ||
| Silver total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Chromium, total recoverable | 1 | 0 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 0 | 0 |
NPDES AZ0025160: inspections, violations and enforcement
NPDES AZ0025160: 5 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 6, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| September 14, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| August 5, 2026 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| August 5, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| June 18, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
NPDES AZ0025160: 6 informal enforcement actions
| Date | What EPA recorded | Agency |
|---|---|---|
| October 8, 2026 | Notice of Violation | State |
| September 15, 2026 | Notice of Violation | State |
| September 14, 2026 | Notice of Violation | State |
| August 10, 2026 | Notice of Violation | State |
| July 27, 2026 | No Further Action | State |
| June 19, 2026 | Notice of Violation | State |
NPDES AZ0025160 (USDOI BR - HOOVER DAM WWTP): no inspection and formal enforcement action on file.
Watch NPDES AZ0025160
NPDES AZ0025160: one email when its EPA record changes — $99/month.
Permits near NPDES AZ0025160
NPDES AZ0025160: 39 pollutant rows, 11 dated events; ICIS-NPDES download, loaded September 15, 2026.