Passage Data · Check a report · Use it from your AI

Nezperce, City of

Sewage treatment plant, Nezperce, Idaho. NPDES permit ID0020397 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit once (last December 2025), 8 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (27 values), outfall 001 form B monthly (4 values), outfall REC form 1 monthly (7 values), outfall REC form 2 monthly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 16 of 48 reports late

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

Period endingParameterReportedLimit
December 2025pH, instantaneous minimum6.4 SU≥ 6.5 SU

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]monthly averagereport 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
BOD, 5-day, 20 deg. Cmonthly average≤ 23 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 34 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≤ 23 lb/dall year001
Solids, total suspendedweekly average≤ 34 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Ammonia nitrogen, total, [as N] 30 daymonthly averagereport only (mg/L)all year001
Ammonia nitrogen, total, [as N] 30 daydaily maximumreport only (mg/L)all year001
Ammonia nitrogen, total, [as N] 30 daymonthly averagereport only (lb/d)all year001
Ammonia nitrogen, total, [as N] 30 daydaily maximumreport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year001
E. coli, MTEC-MFinstantaneous maximum≤ 406 #/100mLall 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
Chlorine, total residualmonthly average≤ .05 mg/Lall year001
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Chlorine, total residualmonthly average≤ .04 lb/dall year001
Chlorine, total residualdaily maximum≤ .04 lb/dall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearREC
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearREC
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearREC
Oxygen, dissolved [DO]monthly averagereport only (mg/L)all yearREC
pHinstantaneous minimumreport only (SU)all yearREC
pHinstantaneous maximumreport only (SU)all yearREC
pHinstantaneous minimumreport only (SU)all yearREC
pHinstantaneous maximumreport only (SU)all yearREC
Ammonia nitrogen, total, [as N] 30 daydaily maximumreport only (mg/L)all yearREC
Ammonia nitrogen, total, [as N] 30 daydaily maximumreport only (mg/L)all yearREC
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearREC
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearREC
E. coli, MTEC-MFdaily maximumreport only (#/100mL)all yearREC
E. coli, MTEC-MFdaily maximumreport only (#/100mL)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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ID0020397 · MCP: https://passage-data.com/mcp