Clean Water Act discharge permit · NPDES CA0077933
WILLIAMS WWTP, Williams, CA: NPDES CA0077933 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 161Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
WILLIAMS WWTP, held by WILLIAMS, CITY OF, holds NPDES permit CA0077933, which discharges to Salt Creek. EPA’s file records it issued December 5, 2008 and expiring December 1, 2013. 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 | WILLIAMS WWTP |
|---|---|
| Permittee as filed | WILLIAMS, CITY OF |
| NPDES ID | CA0077933 |
| 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 | December 5, 2008 |
| Expiration date | December 1, 2013 |
| Address | Williams, CA 95987 |
| Receiving water | SALT CREEK |
| Subwatershed | Salt Creek (HUC 180201040703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 164Pollutants on file
- 161Under a numeric limit
- 16With a violation of any kind
- 3With 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 164 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 4 | 21 | 16 | July 31, 2019 | 232% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 25 | 9 | February 28, 2018 | 278% over the limit |
| BOD, 5-day, 20 deg. C | 12 | 22 | 1 | February 28, 2017 | 18% over the limit |
| Solids, total suspended | 12 | 6 | 0 | ||
| Coliform, total general | 4 | 6 | 0 | ||
| Aluminum, total recoverable | 3 | 4 | 0 | ||
| Chlorine, total residual | 2 | 4 | 0 | ||
| pH | 4 | 2 | 0 | ||
| Specific conductance | 3 | 2 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 1 | 0 | ||
| Solids, total dissolved | 2 | 1 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 1 | 0 | ||
| Temperature, water deg. centigrade | 0 | 1 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 1 | 0 | ||
| Cyanide, total [as CN] | 3 | 0 | 0 | ||
| Iron, total recoverable | 3 | 0 | 0 | ||
| Manganese, total recoverable | 3 | 0 | 0 | ||
| Dichlorobromomethane | 3 | 0 | 0 | ||
| Bromoform | 3 | 0 | 0 | ||
| Dibromochloromethane | 3 | 0 | 0 | ||
| Chloroform | 3 | 0 | 0 | ||
| Turbidity | 2 | 0 | 0 | ||
| Solids, settleable | 2 | 0 | 0 | ||
| Mercury, total recoverable | 2 | 0 | 0 | ||
| %Surv Static 96Hr Acute Pimphales Promelas | 2 | 0 | 0 | ||
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | 2 | 0 | 0 | ||
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| TU Static Renewal 7-Day Chronic Pimphales promelas | 2 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Phosphorus, total [as P] | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Calcium, total recoverable | 1 | 0 | 0 | ||
| Magnesium, total recoverable | 1 | 0 | 0 | ||
| Sodium, total recoverable | 1 | 0 | 0 | ||
| Potassium, total recoverable | 1 | 0 | 0 | ||
| Chloride [as Cl] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Boron, total recoverable | 1 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 1 | 0 | 0 | ||
| Chromium, trivalent [as Cr] | 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 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 1 | 0 | 0 | ||
| Carbon tetrachloride | 1 | 0 | 0 | ||
| 1,2-Dichloroethane | 1 | 0 | 0 | ||
| Toluene | 1 | 0 | 0 | ||
| Benzene | 1 | 0 | 0 | ||
| .delta.-BHC | 1 | 0 | 0 | ||
| Acenaphthylene | 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 CA0077933.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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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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 CA0077933 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.