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ST. Maries, City of

Sewage treatment plant, Saint Maries, Idaho. NPDES permit ID0022799 expired Oct 31, 2025; its limits still apply. Last 12 months: over a limit 2 times (last December 2025), 333 required values missing, 1 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (40 values), form B every 2 months, form C twice a year
Last report on file
December 2025
Oct 2024 – Sep 2025
11 values over a limit, 2 required values missing, 4 of 20 reports late

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

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, percent removal, monthly average minimum72 %≥ 85 %87%
December 2025Solids, suspended percent removal, monthly average minimum82 %≥ 85 %20%

Limits in force (55)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradeweekly averagereport only (deg C)Jun
Turbiditymonthly averagereport only (NTU)all year
Turbiditydaily maximumreport only (NTU)all year
Oxygen, dissolved [DO]monthly averagereport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 500 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 751 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 8.5 SUall year
Alkalinity, carbonate [as CaCO3]monthly averagereport only (mg/L)all year
Alkalinity, carbonate [as CaCO3]daily maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 500 lb/dall year
Solids, total suspendedweekly average≤ 751 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year
Phosphorous, total organic [as P]monthly averagereport only (mg/L)all year
Phosphorous, total organic [as P]daily maximumreport only (mg/L)all year
Phosphate, ortho, dissolved [as P]monthly averagereport only (mg/L)all year
Phosphate, ortho, dissolved [as P]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Nickel, total recoverablemonthly averagereport only (mg/L)all year
Nickel, total recoverabledaily maximumreport only (mg/L)all year
Zinc, total recoverablemonthly averagereport only (mg/L)all year
Zinc, total recoverabledaily maximumreport only (mg/L)all year
Copper, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverabledaily maximumreport only (mg/L)all year
Whole effluent toxicitymonthly average≤ 13.6 toxicall year
Whole effluent toxicityweekly average≤ 44.4 toxicall year
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year
E. coli, MTEC-MFinstantaneous maximum≤ 235 #/100mLall year
Floating solids, waste or visible foam-visualmonthly maximum≤ 0 N=0;Y=1all 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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .16 mg/Lall year
Chlorine, total residualdaily maximum≤ .404 mg/Lall year
Chlorine, total residualmonthly average≤ 2.7 lb/dall year
Chlorine, total residualdaily maximum≤ 6.7 lb/dall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Idaho'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/ID0022799 · MCP: https://passage-data.com/mcp