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Elk River, City of

Sewage treatment plant, Elk River, Idaho. NPDES permit ID0020362 expired Aug 31, 2023; its limits still apply. Last 12 months: over a limit once (last April 2026), 5 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 16 reports late

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

Period endingParameterReportedLimitOver by
April 2026Solids, suspended percent removal, monthly average minimum81 %≥ 85 %27%

Limits in force (34)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradeweekly averagereport only (deg C)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 30 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
pHinstantaneous minimum≥ 6.5 SUJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
pHinstantaneous maximum≤ 9 SUJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, total suspendedmonthly average≤ 20 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, total suspendedweekly average≤ 30 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
E. coli, MTEC-MFinstantaneous maximum≤ 406 #/100mLJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Floating solids, waste or visible foam-visualmonthly maximum≤ 0 N=0;Y=1Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Chlorine, total residualmonthly average≤ .09 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Chlorine, total residualdaily maximum≤ .21 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Chlorine, total residualmonthly average≤ .06 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Chlorine, total residualdaily maximum≤ .14 lb/dJan, Feb, Mar, Apr, May, Jun, Nov, Dec001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Solids, suspended percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, May, Jun, Nov, Dec001
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, May, Jun, Nov, DecREC
pHinstantaneous minimumreport only (SU)Jan, Feb, Mar, Apr, May, Jun, Nov, DecREC
pHinstantaneous maximumreport only (SU)Jan, Feb, Mar, Apr, May, Jun, Nov, DecREC
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Jun, Nov, DecREC
Phosphorus, total [as P]daily maximumreport only (ug/L)Jan, Feb, Mar, Apr, May, Jun, Nov, DecREC

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/ID0020362 · MCP: https://passage-data.com/mcp