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NPDES permit MT0032051 · Minor NON-POTW · administratively continued, expires 2026-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2026-07-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MT permits in EPA's filings — check your permit).

Limits in force (19)

OutfallParameterStatisticLimitMonths
SUMATemperature, water deg. fahrenheitMO AVG report only all year
SUMAFlow rateMO AVG report only all year
SUMAFlow rateDAILY MX report only all year
SUMABOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
SUMABOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
SUMApHMINIMUM >= 6 SU all year
SUMApHMAXIMUM <= 9 SU all year
SUMASolids, total suspendedMO AVG <= 30 mg/L all year
SUMASolids, total suspendedMX WK AV <= 45 mg/L all year
SUMANitrogen, total [as N]MO AVG report only all year
SUMANitrogen, total [as N]DAILY MX report only all year
SUMANitrogen, ammonia total [as N]MO AVG report only all year
SUMANitrite + Nitrate total [as N]MO AVG report only all year
SUMAPhosphorus, total [as P]MO AVG report only all year
SUMAPhosphorus, total [as P]DAILY MX report only all year
SUMAE. coli, MTEC-MFMOAV GEO <= 2.2 #/100mL all year
SUMAE. coli, MTEC-MFMX WK AV <= 12.6 #/100mL all year
SUMAChlorine, total residualMO AVG <= .1 mg/L all year
SUMAChlorine, total residualDAILY MX <= .1 mg/L all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states