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Sewage treatment plant, major discharger, Marysville, California. NPDES permit CA0079651, in force until Jan 31, 2028. Last 12 months: over a limit 6 times (last August 2026), 2 of 41 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | pH, minimum | 0 SU | ≥ 6 SU | — |
| February 2026 | Dichlorobromomethane, monthly average | 48 ug/L | ≤ 38 ug/L | 26% |
| March 2026 | Chlorodibromomethane, monthly average | 27 ug/L | ≤ 18 ug/L | 50% |
| April 2026 | pH, minimum | 3.9 SU | ≥ 6 SU | — |
| July 2026 | Chlorodibromomethane, monthly average | 22 ug/L | ≤ 18 ug/L | 22% |
| August 2026 | Chlorodibromomethane, monthly average | 26 ug/L | ≤ 18 ug/L | 44% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 001 |
| Turbidity | daily average | report only (NTU) | all year | 001 |
| Turbidity | maximum | report only (NTU) | all year | 001 |
| Specific conductance | daily maximum | report only (umho/cm) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 10 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 15 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 5.2 mg/L | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrite + Nitrate total [as N] | weekly average | ≤ 17 mg/L | all year | 001 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 001 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Dichlorobromomethane | monthly average | ≤ 38 ug/L | all year | 001 |
| Dichlorobromomethane | daily maximum | ≤ 70 ug/L | all year | 001 |
| Chlorodibromomethane | monthly average | ≤ 18 ug/L | all year | 001 |
| Chlorodibromomethane | daily maximum | ≤ 36 ug/L | all year | 001 |
| Chlorpyrifos | daily maximum | report only (ug/L) | all year | 001 |
| Chlorpyrifos | daily maximum | report only (ug/L) | all year | 001 |
| Diazinon | daily maximum | report only (ug/L) | all year | 001 |
| Diazinon | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | 4-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | 1-hour average | ≤ .019 mg/L | all year | 001 |
| Diazinon + Chlorpyrifos | monthly average | ≤ 1 ug/L | all year | 001 |
| Diazinon + Chlorpyrifos | monthly average | ≤ 1 ug/L | all year | 001 |
| Diazinon + Chlorpyrifos | weekly average | ≤ 1 ug/L | all year | 001 |
| Diazinon + Chlorpyrifos | weekly average | ≤ 1 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total recoverable | annual total | ≤ .46 lb/yr | all year | 001 |
| Mercury, total recoverable | annual total | ≤ .46 lb/yr | all year | 001 |
| Coliform, total general | 30-day maximum | ≤ 23 MPN/100mL | all year | 001 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 001 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 001 |
| Dechlorination reagent, gen | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| %Surv Static Renewal 96Hr Oncorhynchus mykiss | minimum | ≥ 70 % survival | all year | 001 |
| %Surv Static Renewal 96Hr Oncorhynchus mykiss | minimum | ≥ 70 % survival | all year | 001 |
| %Surv Static Renewal 96Hr Oncorhynchus mykiss | minimum median | ≥ 90 % survival | all year | 001 |
| %Surv Static Renewal 96Hr Oncorhynchus mykiss | minimum median | ≥ 90 % survival | all year | 001 |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | minimum | ≥ 70 % survival | all year | 001 |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | minimum | ≥ 70 % survival | all year | 001 |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | minimum median | ≥ 90 % survival | all year | 001 |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | minimum median | ≥ 90 % survival | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | average | report only (tox chronic) | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | average | report only (tox chronic) | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | average | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | average | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | average | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | average | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | daily maximum | report only (tox chronic) | all year | 001 |
| Acute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr O mykiss | value | report only (pass=0;fail=1) | all year | 001 |
| Acute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr O mykiss | value | report only (pass=0;fail=1) | all year | 001 |
| Acute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr O mykiss | maximum | report only (% effect) | all year | 001 |
| Acute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr O mykiss | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d P promelas | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d P promelas | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d P promelas | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d P promelas | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Reprod Endpt Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubia | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Reprod Endpt Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubia | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Reprod Endpt Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubia | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd, Survival Endpt %Effect, Reprod Endpt Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubia | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitata | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitata | value | report only (pass=0;fail=1) | all year | 001 |
| Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitata | maximum | report only (% effect) | all year | 001 |
| Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitata | maximum | report only (% effect) | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 002 |
| Specific conductance | daily maximum | report only (umho/cm) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 10 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.9 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 5.2 mg/L | all year | 002 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 10 mg/L | all year | 002 |
| Nitrite + Nitrate total [as N] | weekly average | ≤ 17 mg/L | all year | 002 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 002 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Dichlorobromomethane | monthly average | ≤ 38 ug/L | all year | 002 |
| Dichlorobromomethane | daily maximum | ≤ 70 ug/L | all year | 002 |
| Chlorodibromomethane | monthly average | ≤ 18 ug/L | all year | 002 |
| Chlorodibromomethane | daily maximum | ≤ 36 ug/L | all year | 002 |
| Chlorpyrifos | daily maximum | report only (ug/L) | all year | 002 |
| Chlorpyrifos | daily maximum | report only (ug/L) | all year | 002 |
| Diazinon | daily maximum | report only (ug/L) | all year | 002 |
| Diazinon | daily maximum | report only (ug/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Diazinon + Chlorpyrifos | monthly average | ≤ 1 ug/L | all year | 002 |
| Diazinon + Chlorpyrifos | monthly average | ≤ 1 ug/L | all year | 002 |
| Diazinon + Chlorpyrifos | weekly average | ≤ 1 ug/L | all year | 002 |
| Diazinon + Chlorpyrifos | weekly average | ≤ 1 ug/L | all year | 002 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 002 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | all year | 002 |
| Mercury, total recoverable | annual total | ≤ .46 lb/yr | all year | 002 |
| Mercury, total recoverable | annual total | ≤ .46 lb/yr | all year | 002 |
| Coliform, total general | 30-day maximum | ≤ 23 MPN/100mL | all year | 002 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 002 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | INF |
| pH | minimum | report only (SU) | all year | INF |
| pH | maximum | report only (SU) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | INF |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | INF |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | INF |
Cited limits by parameter: California's rules and the federal ones.
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