Clean Water Act discharge permit · NPDES CA0038091
BENICIA WWTP, Benicia, CA: NPDES CA0038091 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 162Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
BENICIA WWTP, held by Benicia, City of, holds NPDES permit CA0038091, which discharges to Carquinez Strait. EPA’s file records it issued December 11, 2019 and expiring January 31, 2025. 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 | BENICIA WWTP |
|---|---|
| Permittee as filed | Benicia, City of |
| NPDES ID | CA0038091 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 11, 2019 |
| Expiration date | January 31, 2025 |
| Address | Benicia, CA 94510 |
| Receiving water | Carquinez Strait |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler CAD000626796 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 176Pollutants on file
- 162Under a numeric limit
- 170With 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; the 60 with the most exceedances of 176 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| 4,4'-DDE | 2 | 13 | 8 | December 31, 2006 | 425% over the limit |
| Dieldrin | 2 | 13 | 8 | December 31, 2006 | 1,400% over the limit |
| Chlorine, total residual | 2 | 13 | 4 | May 31, 2024 | 99,999% over the limit |
| Solids, total suspended | 4 | 18 | 2 | January 31, 2026 | 51% over the limit |
| Cyanide, total [as CN] | 4 | 26 | 1 | September 30, 2004 | 20% over the limit |
| Oil and grease | 4 | 17 | 1 | July 31, 2005 | 4% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 9 | 1 | June 30, 2017 | 300% over the limit |
| Copper, total recoverable | 2 | 7 | 1 | January 31, 2007 | 112% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 16 | 0 | ||
| % Survival Flow Through 96Hr Acute Pimephales promelas | 2 | 16 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 14 | 0 | ||
| Mercury, total recoverable | 4 | 11 | 0 | ||
| pH | 2 | 8 | 0 | ||
| Selenium, total recoverable | 2 | 8 | 0 | ||
| TU Static 48Hr Chronic Mytilis Edulis | 0 | 8 | 0 | ||
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 2 | 6 | 0 | ||
| Temperature, water deg. centigrade | 0 | 5 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 5 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 5 | 0 | ||
| TCDD equivalents | 4 | 4 | 0 | ||
| Thallium, total recoverable | 2 | 4 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 4 | 0 | ||
| Antimony, total recoverable | 2 | 4 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 2 | 4 | 0 | ||
| Dichlorobromomethane | 2 | 4 | 0 | ||
| Carbon tetrachloride | 2 | 4 | 0 | ||
| 1,2-Dichloroethane | 2 | 4 | 0 | ||
| Bromoform | 2 | 4 | 0 | ||
| Dibromochloromethane | 2 | 4 | 0 | ||
| Chloroform | 2 | 4 | 0 | ||
| Toluene | 2 | 4 | 0 | ||
| Benzene | 2 | 4 | 0 | ||
| .delta.-BHC | 2 | 4 | 0 | ||
| Acenaphthylene | 2 | 4 | 0 | ||
| Acenaphthene | 2 | 4 | 0 | ||
| Acrolein | 2 | 4 | 0 | ||
| Acrylonitrile | 2 | 4 | 0 | ||
| Anthracene | 2 | 4 | 0 | ||
| Benzo[b]fluoranthene | 2 | 4 | 0 | ||
| Benzo[k]fluoranthene | 2 | 4 | 0 | ||
| Benzo[a]pyrene | 2 | 4 | 0 | ||
| Bis[2-chloroethyl] ether | 2 | 4 | 0 | ||
| Bis[2-chloroethoxy]methane | 2 | 4 | 0 | ||
| Bis[2-chloroisopropyl] ether | 2 | 4 | 0 | ||
| Butyl benzyl phthalate | 2 | 4 | 0 | ||
| Chlorobenzene | 2 | 4 | 0 | ||
| Chrysene | 2 | 4 | 0 | ||
| Diethyl phthalate | 2 | 4 | 0 | ||
| Dimethyl phthalate | 2 | 4 | 0 | ||
| 1,2-Diphenylhydrazine | 2 | 4 | 0 | ||
| Endosulfan sulfate | 2 | 4 | 0 | ||
| .beta.-Endosulfan | 2 | 4 | 0 | ||
| .alpha.-Endosulfan | 2 | 4 | 0 | ||
| Endrin aldehyde | 2 | 4 | 0 | ||
| Ethylbenzene | 2 | 4 | 0 | ||
| Fluoranthene | 2 | 4 | 0 | ||
| Fluorene | 2 | 4 | 0 | ||
| Hexachlorocyclopentadiene | 2 | 4 | 0 | ||
| Hexachlorobutadiene | 2 | 4 | 0 | ||
| Hexachloroethane | 2 | 4 | 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 CA0038091.
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.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.