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Emmett, City of

Sewage treatment plant, Emmett, Idaho. NPDES permit ID0020311 expired Jan 2, 2007; its limits still apply. Last 12 months: over a limit once (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (43 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
August 2026Solids, total suspended, weekly average884 lb/d≤ 580 lb/d52%

Limits in force (50)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LMay–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LMay–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 713 lb/dMay–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 1426 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 1070 lb/dMay–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 2139 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9.5 SUall year
Solids, total suspendedmonthly average≤ 70 mg/Lall year
Solids, total suspendedweekly average≤ 105 mg/Lall year
Solids, total suspendedmonthly average≤ 385 lb/dall year
Solids, total suspendedweekly average≤ 580 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 74 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 205 lb/dall 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
Phosphate, ortho [as PO4]monthly averagereport only (mg/L)all year
Phosphate, ortho [as PO4]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 50 #/100mLMay–Sep
Coliform, fecal MF, MFC broth, 44.5 Cweekly average≤ 200 #/100mLMay–Sep
Coliform, fecal MF, MFC broth, 44.5 Cweekly average≤ 200 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year
E. coli, MTEC-MFinstantaneous maximum≤ 406 #/100mLall 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≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ 2 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
Chlorine, total residualmonthly average≤ 4.8 lb/dall year
Chlorine, total residualdaily maximum≤ 4.8 lb/dall year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
BOD, 5-day, percent removalminimum % removal≥ 65 %Jan, Feb, Mar, Apr, Oct, Nov, Dec
Solids, suspended percent removalminimum % removalreport only (%)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/ID0020311 · MCP: https://passage-data.com/mcp