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Town of Valier

Sewage treatment plant, Valier, Montana. NPDES permit MT0021792, in force until Feb 28, 2027. Last 12 months: over a limit 5 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (21 values), form S1 twice a year
Renewal application due
Sep 1, 2026 · 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, 0 required values missing, 0 of 14 reports late

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

Period endingParameterReportedLimitOver by
May 2026Solids, suspended percent removal, minimum82 %≥ 85 %20%
May 2026Solids, total suspended, monthly average31 mg/L≤ 30 mg/L3%
June 2026BOD, 5-day, percent removal, minimum60 %≥ 85 %167%
June 2026E. coli, MTEC-MF, maximum 7-day geometric mean1986.3 #/100mL≤ 1260 #/100mL58%
June 2026E. coli, MTEC-MF, maximum 7-day geometric mean1986.3 #/100mL≤ 252 #/100mL688%

Limits in force (22)

ParameterStatisticLimitMonths
Flow ratemonthly averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly maximum≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 9 lb/dall year
BOD, 5-day, 20 deg. Cweekly maximum≤ 13 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 9 lb/dall year
Solids, total suspendedweekly maximum≤ 13 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Oil & Greasemonthly maximum≤ 10 mg/Lall year
E. coli, MTEC-MFmonthly geometric mean≤ 630 #/100mLall year
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLApr–Oct
E. coli, MTEC-MFmaximum 7-day geometric mean≤ 1260 #/100mLall year
E. coli, MTEC-MFmaximum 7-day geometric mean≤ 252 #/100mLApr–Oct
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
Oil and grease visualvaluereport only (Y=0;N=1)all year

How strict are these limits?

Cited limits by parameter: Montana'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/MT0021792 · MCP: https://passage-data.com/mcp