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Grace, City of

Sewage treatment plant, Grace, Idaho. NPDES permit ID0023825, in force until Jun 30, 2027. Last 12 months: no values over a limit, 2 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form M monthly (33 values), outfall REC1 form M monthly (2 values), outfall REC1 form Q quarterly (4 values)
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 29 reports late

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigrademaximum daily averagereport only (deg C)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≤ 109 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 163 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≤ 23.5 lb/dall year001
Solids, total suspendedannual average≤ 8.49 lb/dJan001
Solids, total suspendedweekly average≤ 48.2 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 11.9 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 63.3 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 43.7 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 232.2 lb/dall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 5.77 lb/dall year001
Phosphorus, total [as P]annual average≤ 2.36 lb/dJan001
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≤ 163 ug/Lall year001
Chlorine, total residualdaily maximum≤ 473 ug/Lall year001
Chlorine, total residualmonthly average≤ .6 lb/dall year001
Chlorine, total residualdaily maximum≤ 1.74 lb/dall year001
Enterococcimonthly geometric mean≤ 35 #/100mLall year001
Enterococciinstantaneous maximum≤ 130 #/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
pHinstantaneous minimumreport only (SU)all yearREC1
pHinstantaneous maximumreport only (SU)all yearREC1
Nitrogen, ammonia total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecREC1
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, DecREC1
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecREC1
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Sep, DecREC1

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/ID0023825 · MCP: https://passage-data.com/mcp