CITY OF LAUREL

NPDES permit MT0020311 · Major POTW · administratively continued, expires 2021-03-31 · 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.

This permit expired on 2021-03-31 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 11 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 (37)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheit30DA AVG report only all year
001Flow rate30DA AVG report only all year
001Flow rate30DA AVG report only all year
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 220 lb/d all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 330 lb/d all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 220 lb/d all year
001Solids, total suspendedMX 7D AV <= 330 lb/d all year
001Solids, total suspended30DA AVG report only all year
001Oil and grease, hexane extr method7 DA AVG <= 10 mg/L all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]30DA AVG <= 233 lb/d all year
001Nitrogen, total [as N]MX DA AV <= 363 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 2.8 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 5.6 mg/L all year
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrite + Nitrate total [as N]30DA AVG <= 10 mg/L all year
001Nitrite + Nitrate total [as N]DAILY MX <= 10 mg/L all year
001Nitrite + Nitrate total [as N]30DA AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]30DA AVG <= 47 lb/d all year
001Phosphorus, total [as P]MX 7D AV <= 73 lb/d all year
001E. coli, MTEC-MF30DAVGEO <= 630 CFU/100mL Jan, Feb, Mar, Nov, Dec
001E. coli, MTEC-MF30DAVGEO <= 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-MF7I <= 252 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residual30DA AVG <= .1 mg/L all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % 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