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Town of Alberton

Sewage treatment plant, Alberton, Montana. NPDES permit MT0021555 expired Oct 31, 2026. Last 12 months: over a limit 2 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (28 values), form Q quarterly (3 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 14 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
April 2026BOD, 5-day, 20 deg. C, monthly average30.25 mg/L≤ 30 mg/L1%
April 2026BOD, 5-day, 20 deg. C, maximum weekly average50 mg/L≤ 45 mg/L11%

Limits in force (33)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
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. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13.5 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 20.3 lb/dall year
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall year
Solids, total suspendedmonthly average≤ 20.3 lb/dall year
Solids, total suspendedmaximum weekly average≤ 29.3 lb/dall year
Solids, total suspendedvaluereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Jun–Sep
Nitrogen, total [as N]daily maximumreport only (mg/L)Jun–Sep
Nitrogen, total [as N]monthly averagereport only (lb/d)Jun–Sep
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep
Phosphorus, total [as P]monthly averagereport only (lb/d)Jun–Sep
E. coli, MTEC-MFmonthly geometric mean≤ 630 #/100mLJan, Feb, Mar, Nov, Dec
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLApr–Oct
E. coli, MTEC-MFmaximum weekly average≤ 1260 #/100mLJan, Feb, Mar, Nov, Dec
E. coli, MTEC-MFmaximum weekly average≤ 252 #/100mLApr–Oct
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 65 %all year

How strict are these limits?

Cited limits by parameter: Montana'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/MT0021555 · MCP: https://passage-data.com/mcp