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Olivehurst Public Utility District

Sewage treatment plant, major discharger, Olivehurst, California. NPDES permit CA0077836 expired May 31, 2026; its limits still apply. Last 12 months: over a limit once (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001 form A monthly (22 values), outfall 001 form Q quarterly (20 values), outfall INF form A monthly (6 values), outfall 001 form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 0 of 29 reports late

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

Period endingParameterReportedLimitOver by
September 2026%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, median56.3 % effect≤ 25 % effect125%

Limits in force (58)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year001
Specific conductanceannual average≤ 875 umho/cmall year001
Specific conductanceannual average≤ 875 umho/cmall year001
Specific conductancedaily maximumreport only (umho/cm)all year001
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)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≥ 6.5 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≤ 1.6 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 3.6 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≤ 10 mg/Lall year001
Nitrite + Nitrate total [as N]weekly average≤ 19 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
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Copper, total recoverablemonthly average≤ 11 ug/Lall year001
Copper, total recoverablemonthly average≤ 11 ug/Lall year001
Copper, total recoverabledaily maximum≤ 17 ug/Lall year001
Copper, total recoverabledaily maximum≤ 17 ug/Lall year001
Diazinondaily maximumreport only (ug/L)all year001
Diazinondaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all 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≤ 2.2 MPN/100mLall year001
Coliform, total general30-day maximum≤ 23 MPN/100mLall year001
Coliform, total generalinstantaneous maximum≤ 240 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Chlorpyrifosdaily maximumreport only (ug/L)all year001
Chlorpyrifosdaily maximumreport only (ug/L)all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamedian≤ 25 % effectall year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamedian≤ 25 % effectall year001
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum≥ 70 % survivalall year001
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum≥ 70 % survivalall year001
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum median≥ 90 % survivalall year001
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum median≥ 90 % survivalall year001
% Survival Flow Through 96Hr Acute Pimephales promelasminimum≥ 70 % survivalall year001
% Survival Flow Through 96Hr Acute Pimephales promelasminimum≥ 70 % survivalall year001
% Survival Flow Through 96Hr Acute Pimephales promelasminimum median≥ 90 % survivalall year001
% Survival Flow Through 96Hr Acute Pimephales promelasminimum median≥ 90 % survivalall year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamedian≤ 16 tox chronicall year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamedian≤ 16 tox chronicall 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
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

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/CA0077836 · MCP: https://passage-data.com/mcp