TOWN OF COLUMBUS

NPDES permit MT0031801 · Minor POTW · effective, expires 2028-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

8values over a limit
0required values missing, on 0 form(s)
1of 36 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, suspended percent removal (3), pH (3), E. coli, MTEC-MF (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (38)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeQRTR AVG report only (alert) all year
001Flow rateMO AVG report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHQC report only all year
001pHQB report only all year
001Solids, total suspendedMO AVG <= 100 mg/L all year
001Solids, total suspendedMX WK AV <= 135 mg/L all year
001Solids, total suspendedMO AVG <= 209 lb/d all year
001Solids, total suspendedMX WK AV <= 304 lb/d all year
001Solids, total suspendedQRTR AVG report only all year
001Oil and grease, hexane extr methodANNL MAX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]QRTR AVG report only all year
001Nitrite + Nitrate total [as N]QRTR AVG report only all year
001Nickel, total recoverableQRTR AVG report only all year
001Copper, total recoverableQRTR AVG report only all year
001E. coli, MTEC-MFMO GEO <= 630 #/100mL Jan, Feb, Mar, Nov, Dec
001E. coli, MTEC-MFMO GEO <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, MTEC-MFWE <= 1260 #/100mL Jan, Feb, Mar, Nov, Dec
001E. coli, MTEC-MFWE <= 252 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 60 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 52 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 135 lb/d all year
001BOD, carbonaceous [5 day, 20 C]QRTR AVG report only all year
001BOD, carbonaceous, percent removalMO AV MN >= 65 % all year
001Solids, suspended percent removalMO AV MN >= 65 % all year
001Oil and grease visualVALUE report only all year
001BNitrogen, total [as N]MO AVG report only Jul, Aug, Sep
001BNitrogen, ammonia total [as N]MO AVG report only all year
001BNitrogen, Kjeldahl, total [as N]MO AVG report only Jul, Aug, Sep
001BNitrite + Nitrate total [as N]MO AVG report only Jul, Aug, Sep
001BPhosphorus, total [as P]MO AVG report only Jul, Aug, Sep
001BIron, total recoverableVALUE report only all year
001BNickel, total recoverableVALUE report only all year
001BCopper, total recoverableVALUE report only all year
001BPass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiaVALUE <= 0 pass=0;fail=1 all year
001BPass/Fail Static Renewal 96Hr Acute Pimephales PromelasVALUE <= 0 pass=0;fail=1 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