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Culdesac, City of

Sewage treatment plant, Culdesac, Idaho. NPDES permit ID0024490, in force until Sep 30, 2028. Last 12 months: over a limit 8 times (last May 2026), 44 required values missing, 8 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (36 values), outfall 001 form Q quarterly (6 values), outfall REC form A monthly (2 values), outfall REC form Q quarterly (3 values)
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 3 required values missing, 1 of 32 reports late

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

Period endingParameterReportedLimitOver by
February 2026Solids, suspended percent removal, monthly average minimum79 %≥ 85 %40%
February 2026Solids, total suspended, monthly average51 mg/L≤ 30 mg/L70%
February 2026Solids, total suspended, weekly average197 mg/L≤ 65 mg/L203%
February 2026Solids, total suspended, weekly average52.6 lb/d≤ 20.6 lb/d155%
May 2026BOD, 5-day, 20 deg. C, monthly average175 mg/L≤ 30 mg/L483%
May 2026BOD, 5-day, 20 deg. C, monthly average44 lb/d≤ 13.7 lb/d221%
May 2026BOD, 5-day, 20 deg. C, weekly average264 mg/L≤ 45 mg/L487%
May 2026BOD, 5-day, 20 deg. C, weekly average66 lb/d≤ 20.6 lb/d220%

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradeweekly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Oxygen, dissolved [DO]instantaneous 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≤ 13.7 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 20.6 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)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≤ 65 mg/Lall year001
Solids, total suspendedmonthly average≤ 13.7 lb/dall year001
Solids, total suspendedweekly average≤ 20.6 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendedweekly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .47 lb/dMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 3.2 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2.22 lb/dMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 7 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
E. coli, MTEC-MFgeometric mean≤ 126 CFU/100mLall year001
E. coli, MTEC-MFinstantaneous maximum≤ 410 CFU/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
PER-AND POLYFLUOROALKYL SUBSTANCESmonthly averagereport only (ng/L)all year001
PER-AND POLYFLUOROALKYL SUBSTANCESdaily maximumreport only (ng/L)all year001
PER-AND POLYFLUOROALKYL SUBSTANCESmonthly averagereport only (ng/L)all year001
PER-AND POLYFLUOROALKYL SUBSTANCESdaily maximumreport only (ng/L)all year001
PER-AND POLYFLUOROALKYL SUBSTANCESmonthly averagereport only (mg/kg)all year001
PER-AND POLYFLUOROALKYL SUBSTANCESdaily maximumreport only (mg/kg)all year001
Enterococcigeometric mean≤ 35 CFU/100mLall year001
Enterococciinstantaneous maximum≤ 130 CFU/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all yearREC
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearREC
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearREC
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearREC
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearREC

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/ID0024490 · MCP: https://passage-data.com/mcp