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Calaveras County Water District and Saddle Creek Golf Club, LLC

Sewage treatment plant, Copperopolis, California. NPDES permit CA0084620, in force until May 31, 2028. Last 12 months: over a limit 3 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001 form A monthly (17 values), outfall 001 form Q quarterly (4 values), outfall INF form A monthly (4 values), outfall 001 form Z every 60 months
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 29 reports late

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

Period endingParameterReportedLimit
February 2026pH, minimum2 SU≥ 6.5 SU
April 2026Nitrogen, ammonia total [as N], monthly average> .1 mg/L≤ 1.1 mg/L
April 2026Nitrogen, ammonia total [as N], weekly average> .1 mg/L≤ 2.3 mg/L

Limits in force (38)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all 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≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 2.3 mg/Lall 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]monthly averagereport only (mg/L)all year001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/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
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
%Effect Static 4 Day Chronic Raphidocelis subcapitatamonthly medianreport only (% effect)all year001
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly medianreport only (% effect)all year001
%Effect Static Renewal 7Day Chronic Pimephales promelasmonthly medianreport only (% effect)all year001
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum≥ 70 % 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 median≥ 90 % survivalall year001
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)averagereport only (tox chronic)all year001
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximumreport 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 dubiadaily maximumreport only (tox chronic)all year001
TU Static Renewal 7-Day Chronic Pimphales promelasaveragereport only (tox chronic)all year001
TU Static Renewal 7-Day Chronic Pimphales promelasdaily maximumreport 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
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CA0084620 · MCP: https://passage-data.com/mcp