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Redding, City of

Sewage treatment plant, major discharger, Anderson, California. NPDES permit CA0079731, in force until Jul 31, 2027. Last 12 months: over a limit once (last July 2026), 4 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001 form A monthly (31 values), outfall 001 form Q quarterly (2 values), outfall INF form A monthly (10 values), outfall 001 form S twice a year, outfall 001 form Y yearly
Renewal application due
Feb 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 32 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
July 2026Copper, total recoverable, monthly average27 ug/L≤ 20 ug/L35%

Limits in force (67)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year001
Specific conductancemonthly averagereport only (umho/cm)all year001
Specific conductancedaily maximumreport only (umho/cm)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 10 mg/Lall year001
Solids, total suspendedweekly average≤ 15 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 5.2 mg/Lall year001
Nitrogen, nitrite total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly average≤ 20 mg/Lall year001
Nitrite + Nitrate total [as N]weekly average≤ 27 mg/Lall year001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)all year001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Zinc, total recoverablemonthly average≤ 79 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 105 ug/Lall year001
Copper, total recoverablemonthly average≤ 20 ug/Lall year001
Copper, total recoverabledaily maximum≤ 27 ug/Lall year001
Dichlorobromomethanemonthly average≤ 16 ug/Lall year001
Dichlorobromomethanedaily maximum≤ 28 ug/Lall year001
Dibromochloromethanemonthly average≤ 3.5 ug/Lall year001
Dibromochloromethanedaily maximum≤ 6.3 ug/Lall year001
Chlorpyrifosdaily maximumreport only (ug/L)all year001
Chlorpyrifosdaily maximumreport only (ug/L)all year001
Diazinondaily maximumreport only (ug/L)all year001
Diazinondaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 8.8 MGDall year001
Chlorine, total residual4-day average≤ .011 mg/Lall year001
Chlorine, total residual1-hour average≤ .019 mg/Lall year001
Diazinon + Chlorpyrifosmonthly average≤ 1 ug/Lall year001
Diazinon + Chlorpyrifosmonthly average≤ 1 ug/Lall year001
Diazinon + Chlorpyrifosweekly average≤ 1 ug/Lall year001
Diazinon + Chlorpyrifosweekly average≤ 1 ug/Lall year001
Coliform, total general7-day median≤ 23 MPN/100mLall year001
Coliform, total general30-day maximum≤ 240 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamedianreport only (% effect)all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamedianreport only (% effect)all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamaximumreport only (% effect)all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamaximumreport only (% effect)all year001
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum≥ 70 % survivalall year001
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum≥ 70 % survivalall year001
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum median≥ 90 % survivalall year001
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum median≥ 90 % survivalall year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum≥ 70 % survivalall year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum≥ 70 % survivalall year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum median≥ 90 % survivalall year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum median≥ 90 % survivalall year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaaveragereport only (tox chronic)all year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaaveragereport only (tox chronic)all year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximumreport only (tox chronic)all year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximumreport only (tox chronic)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearINF
pHminimumreport only (SU)all yearINF
pHmaximumreport only (SU)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF

How strict are these limits?

Cited limits by parameter: California's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CA0079731 · MCP: https://passage-data.com/mcp