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North Idaho Correctional Institution

Sewerage Systems, Cottonwood, Idaho. NPDES permit ID0025887 expired Aug 31, 2022; its limits still apply. Last 12 months: over a limit 9 times (last June 2026), 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (29 values), form M monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 4 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum20.2 mg/L≤ 14 mg/L44%
October 2025Nitrogen, ammonia total [as N], daily maximum5.34 lb/d≤ 3.5 lb/d53%
October 2025Nitrogen, ammonia total [as N], monthly average10.71 mg/L≤ 3.4 mg/L215%
October 2025Nitrogen, ammonia total [as N], monthly average2.6 lb/d≤ .9 lb/d189%
April 2026pH, instantaneous maximum9.1 SU≤ 9 SU—
May 2026Nitrogen, ammonia total [as N], monthly average1.29 lb/d≤ .9 lb/d43%
May 2026Nitrogen, ammonia total [as N], monthly average5.02 mg/L≤ 3.4 mg/L48%
June 2026Nitrogen, ammonia total [as N], monthly average11.35 mg/L≤ 3.4 mg/L234%
June 2026Nitrogen, ammonia total [as N], monthly average2.53 lb/d≤ .9 lb/d181%

Limits in force (33)

ParameterStatisticLimitMonths
Temperature, water deg. centigradeweekly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year
Oxygen, dissolved [DO]monthly averagereport 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≤ 8 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 11 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 8 lb/dall year
Solids, total suspendedweekly average≤ 11 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 3.4 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ .9 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year
E. coli, MTEC-MFinstantaneous maximum≤ 406 #/100mLall year
Floating solids, waste or visible foam-visualmonthly maximumreport only (N=0;Y=1)all 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
Chlorine, total residualmonthly average≤ 50 ug/Lall year
Chlorine, total residualdaily maximum≤ 50 ug/Lall year
Chlorine, total residualmonthly average≤ .01 lb/dall year
Chlorine, total residualdaily maximum≤ .01 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ID0025887 · MCP: https://passage-data.com/mcp