CITY OF RED LODGE

NPDES permit MT0020478 · Major POTW · effective, expires 2027-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
0required values missing, on 0 form(s)
0of 17 forms filed late

Last period with anything received: 2026-07-31.

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 (30)

OutfallParameterStatisticLimitMonths
001Flow rateMO AVG report only all year
001Flow rateDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 153 lb/d all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 230 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CMX DA AV report only all year
001pHWD >= 6 SU all year
001pHWKLY MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 45 mg/L all year
001Solids, total suspendedMX 7D AV <= 65 mg/L all year
001Solids, total suspendedMO AVG <= 450 lb/d all year
001Solids, total suspendedMX 7D AV <= 650 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil and grease, hexane extr methodINST MAX <= 10 mg/L all year
001Nitrogen, total [as N]MO AVG report only Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only Jul, Aug, Sep
001Nitrite + Nitrate total [as N]MO AVG report only Jul, Aug, Sep
001Phosphorus, total [as P]MO AVG report only Jul, Aug, Sep
001E. coli, MTEC-MFMOAV GEO <= 630 CFU/100mL Jan, Feb, Mar, Nov, Dec
001E. coli, MTEC-MFMOAV GEO <= 126 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, MTEC-MFWE <= 1260 CFU/100mL Jan, Feb, Mar, Nov, Dec
001E. coli, MTEC-MFWE <= 252 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, percent removalMINIMUM >= 65 % all year
001Solids, suspended percent removalMINIMUM >= 65 % all year
001Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiaSINGSAMP report only all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasSINGSAMP report only 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