Clean Water Act discharge permit · NPDES CA0079529
COLFAX WASTEWATER TREATMENT PLANT, Colfax, CA: NPDES CA0079529 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 198Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
COLFAX WASTEWATER TREATMENT PLANT, held by Colfax, City of, holds NPDES permit CA0079529, which discharges to Tributary To Smuthers Ravine. EPA’s file records it issued May 30, 2013 and expiring July 1, 2018. 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 | COLFAX WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | Colfax, City of |
| NPDES ID | CA0079529 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 30, 2013 |
| Expiration date | July 1, 2018 |
| Address | Colfax, CA 95713 |
| Receiving water | Tributary to Smuthers Ravine |
| Subwatershed | Magnolia Creek-Bear River (HUC 180201260301) |
| 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
- 203Pollutants on file
- 198Under a numeric limit
- 16With 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 203 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Arsenic, total recoverable | 4 | 4 | 4 | January 31, 2017 | 99,999% over the limit |
| Coliform, total general | 2 | 4 | 4 | August 31, 2023 | 99,999% over the limit |
| Solids, total suspended | 7 | 3 | 3 | January 31, 2017 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 3 | 3 | May 31, 2022 | 62% over the limit |
| BOD, 5-day, percent removal | 1 | 3 | 3 | November 30, 2021 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 7 | 2 | 2 | January 31, 2017 | 99,999% over the limit |
| Solids, suspended percent removal | 1 | 2 | 2 | April 30, 2020 | 99,999% over the limit |
| pH | 2 | 2 | 1 | January 31, 2020 | |
| %Surv Static Renewal 96Hr Oncorhynchus mykiss | 0 | 4 | 0 | ||
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | 0 | 4 | 0 | ||
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | 4 | 2 | 0 | ||
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| TU Static Renewal 7-Day Chronic Pimphales promelas | 4 | 2 | 0 | ||
| %Effect Static 4 Day Chronic Raphidocelis subcapitata | 0 | 1 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| %Surv Static 96Hr Acute Pimphales Promelas | 4 | 0 | 0 | ||
| %Surv Static 96Hr Acute Oncorhynchus Mykiss | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Chloride [as Cl] | 3 | 0 | 0 | ||
| Iron, total recoverable | 3 | 0 | 0 | ||
| Manganese, total recoverable | 3 | 0 | 0 | ||
| Turbidity | 2 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 2 | 0 | 0 | ||
| Solids, settleable | 2 | 0 | 0 | ||
| Calcium, total recoverable | 2 | 0 | 0 | ||
| Magnesium, total recoverable | 2 | 0 | 0 | ||
| Sodium, total recoverable | 2 | 0 | 0 | ||
| Potassium, total recoverable | 2 | 0 | 0 | ||
| Boron, total recoverable | 2 | 0 | 0 | ||
| Chlorine, total residual | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Specific conductance | 1 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Cyanide, total [as CN] | 1 | 0 | 0 | ||
| Sulfite [as SO3] | 1 | 0 | 0 | ||
| Sulfide, total [as S] | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Sulfate, total [as SO4] | 1 | 0 | 0 | ||
| Asbestos | 1 | 0 | 0 | ||
| Fluoride, total [as F] | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Barium, total recoverable | 1 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Silver total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Aluminum, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Chromium, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Molybdenum, total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 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 CA0079529.
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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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.