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Mid-Valley Sewer Company LLC

Sewerage Systems, Ketchum, Idaho. NPDES permit ID0024422 expired Jul 31, 2017; its limits still apply. Last 12 months: no values over a limit, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form A monthly (27 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 7 of 12 reports late

Limits in force (40)

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)Jun, Dec
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jun, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 38 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)Jun, Dec
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)Jun, Dec
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 8.3 lb/dall year
Solids, total suspendedannual average≤ 3.3 lb/dDec
Solids, total suspendedweekly average≤ 26 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]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jun, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 2.3 lb/dall year
Phosphorus, total [as P]daily maximum≤ 3.8 lb/dall year
Oil and greasemonthly averagereport only (mg/L)Jun, Dec
Oil and greasedaily maximumreport only (mg/L)Jun, 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
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coliinstantaneous maximum≤ 406 #/100mLall year
E. colimonthly geometric mean≤ .48 BCFU/dall year
Solids, total dissolvedmonthly averagereport only (mg/L)Jun, Dec
Solids, total dissolveddaily maximumreport only (mg/L)Jun, Dec
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %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/ID0024422 · MCP: https://passage-data.com/mcp