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Elk City Water and Sewer Association

Sewage treatment plant, Elk City, Idaho. NPDES permit ID0022012 expired Apr 30, 2020; its limits still apply. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (30 values), outfall REC form A monthly (1 value), outfall 001 form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 25 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, percent removal, monthly average minimum79.4 %≥ 85 %37%

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximum daily averagereport only (deg C)May001
Temperature, water deg. centigrademaximum daily averagereport only (deg C)Jun–Sep001
Temperature, water deg. centigradehighest 7-day averagereport only (deg C)May001
Temperature, water deg. centigradehighest 7-day averagereport only (deg C)Jun–Sep001
Temperature, water deg. centigradeinstantaneous maximum≤ 23 deg CMay001
Temperature, water deg. centigradeinstantaneous maximum≤ 23 deg CJun–Sep001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 lb/dall year001
Solids, total suspendedweekly average≤ 45 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedannual average≤ 45 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 25 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 65 lb/dall year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 CFU/100mLall year001
E. coli, MTEC-MFinstantaneous maximum≤ 576 CFU/100mLall year001
Floating solids, waste or visible foam-visualmonthly maximum≤ 0 N=0;Y=1all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ 50 ug/Lall year001
Chlorine, total residualdaily maximum≤ 50 ug/Lall year001
Chlorine, total residualmonthly average≤ .05 lb/dall year001
Chlorine, total residualdaily maximum≤ .05 lb/dall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Stream flow, instantaneousmonthly averagereport only (MGD)all yearREC

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/ID0022012 · MCP: https://passage-data.com/mcp