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Moscow, City of

Sewage treatment plant, major discharger, Moscow, Idaho. NPDES permit ID0021491, in force until Jan 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form M monthly (53 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (57)

ParameterStatisticLimitMonths
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradevaluereport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradedaily minimumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradevaluereport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradedaily minimumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Streamflowdaily minimumreport only (cfs)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
Oxygen, dissolved percent saturationinstantaneous minimum≥ 90 %all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous minimumreport only (SU)all year
pHinstantaneous maximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 22 mg/Lall year
Solids, total suspendedmonthly average≤ 500.4 lb/dall year
Solids, total suspendedweekly average≤ 750.6 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .153 mg/LMay–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]average≤ .136 mg/LMay–Oct
Phosphorus, total [as P]averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]monthly average≤ 5.1 lb/dMay–Oct
Phosphorus, total [as P]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]average≤ 4.5 lb/dMay–Oct
Phosphorus, total [as P]averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)all 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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ 50 ug/Lall year
Chlorine, total residualdaily maximum≤ 50 ug/Lall year
Chlorine, total residualmonthly average≤ 1.6 lb/dall year
Chlorine, total residualdaily maximum≤ 1.6 lb/dall year
E. colimonthly geometric mean≤ 100 #/100mLall year
E. coliinstantaneous maximum≤ 320 #/100mLall year
Are You In Compliancevaluereport only (Y=0;N=1)all year
Chem. oxygen demand [COD] % removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Chemical Oxygen Demand [COD]monthly average≤ 187.5 mg/Lall year
Chemical Oxygen Demand [COD]weekly average≤ 281.3 mg/Lall year
Chemical Oxygen Demand [COD]monthly average≤ 6255 lb/dall year
Chemical Oxygen Demand [COD]weekly average≤ 9382 lb/dall year
Chemical Oxygen Demand [COD]monthly averagereport only (mg/L)all year
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiavalue≤ 1 Ratio (alert, not enforceable)Mar, Jun, Sep, Dec
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasvalue≤ 1 Ratio (alert, not enforceable)Mar, Jun, Sep, Dec

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/ID0021491 · MCP: https://passage-data.com/mcp