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State of California Department of Parks and Recreation

Gold Ores, Nevada City, California. NPDES permit CA0085332, in force until Mar 31, 2028. Last 12 months: no values over a limit, 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form A monthly (26 values), form Q quarterly (4 values), form Y yearly
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 3 of 18 reports late

Limits in force (37)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year
Turbiditydaily maximumreport only (NTU)all year
Specific conductancedaily maximumreport only (umho/cm)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
pHminimum≥ 5.4 SUall year
pHmaximum≤ 9.8 SUall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, settleabledaily maximumreport only (mL/L)all year
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Iron, total recoverablemonthly average≤ 160000 ug/Lall year
Iron, total recoverabledaily maximum≤ 450000 ug/Lall year
Nickel, total recoverablemonthly average≤ 330 ug/Lall year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverabledaily maximum≤ 620 ug/Lall year
Zinc, total recoverablemonthly average≤ 260 ug/Lall year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverabledaily maximum≤ 580 ug/Lall year
Aluminum, total recoverablemonthly average≤ 210000 ug/Lall year
Aluminum, total recoverabledaily maximum≤ 660000 ug/Lall year
Copper, total recoverablemonthly average≤ 340 ug/Lall year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverabledaily maximum≤ 1000 ug/Lall year
Manganese, total recoverablemonthly average≤ 3800 ug/Lall year
Manganese, total recoverabledaily maximum≤ 7300 ug/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total recoverableannual average≤ .15 ug/Lall year
Mercury, total recoverableannual average≤ .15 ug/Lall year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
Mercury, total recoverableannual total≤ .012 ug/Lall year
Mercury, total recoverableannual total≤ .012 ug/Lall year
Methylmercurydaily maximumreport only (ug/L)all year
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum≥ 70 % survivalall year
%Surv Static Renewal 96Hr Oncorhynchus mykissminimum median≥ 90 % survivalall year
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum≥ 70 % survivalall year
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum median≥ 90 % survivalall year

New limits from Oct 13, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Aluminum, total recoverable, daily maximum290 ug/Ltighter355 ug/L (9 values)1.22×
Aluminum, total recoverable, monthly average94 ug/Ltighter355 ug/L (9 values)3.78×
Copper, total recoverable, monthly average1.3 ug/Ltighter2.5 ug/L (6 values)1.92×
Iron, total recoverable, monthly average710 ug/Ltighter2000 ug/L (9 values)2.82×
Manganese, total recoverable, daily maximum130 ug/Ltighter1104 ug/L (4 values)8.5×
Manganese, total recoverable, monthly average72 ug/Ltighter1105 ug/L (4 values)15.3×
Nickel, total recoverable, daily maximum26 ug/Ltighter38 ug/L (6 values)1.46×
Nickel, total recoverable, monthly average14 ug/Ltighter38 ug/L (6 values)2.71×
Copper, total recoverable, daily maximum3.9 ug/Ltighter2.5 ug/L (6 values)0.641×
Iron, total recoverable, daily maximum2000 ug/Ltighter2000 ug/L (9 values)1×
Zinc, total recoverable, daily maximum38 ug/Ltighter7.8 ug/L (4 values)0.205×
Zinc, total recoverable, monthly average18 ug/Ltighter7.8 ug/L (4 values)0.433×
pH, maximum8.5 SUtighter7.48 SU (7 values)0.88×

How strict are these limits?

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

Same industry: the 5 Metal Mining permits in California.

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Your permit document is the final word. As JSON: /api/v1/permits/CA0085332 · MCP: https://passage-data.com/mcp