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ST. Anthony, City of

Sewage treatment plant, Saint Anthony, Idaho. NPDES permit ID0020401 expired Nov 30, 2014; its limits still apply. Last 12 months: over a limit once (last April 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 1 days after each period: form A monthly (42 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
April 2026Solids, total suspended, monthly average50 mg/L≤ 45 mg/L11%

Limits in force (44)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 300 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 434 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Alkalinity, total [as CaCO3]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedmonthly average≤ 300 lb/dall year
Solids, total suspendedweekly average≤ 434 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 26 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 53 mg/LJun–Oct
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 173 lb/dJun–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 354 lb/dJun–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Oil and greasemonthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Oil and greasedaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
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≤ .5 mg/Lall year
Chlorine, total residualweekly average≤ .75 mg/Lall year
Chlorine, total residualmonthly average≤ 3.34 lb/dall year
Chlorine, total residualweekly average≤ 5 lb/dall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coliinstantaneous maximum≤ 406 #/100mLall year
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Solids, total dissolveddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %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/ID0020401 · MCP: https://passage-data.com/mcp