MT STERLING, CITY OF

NPDES permit IL0022411 · Minor POTW · effective, expires 2028-03-31 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
66of 66 forms filed late

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

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (57)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN report only all year
001Oxygen, dissolved [DO]MN WK AV report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Chlorine, total residualMO AVG <= .75 mg/L all year
001Flow, totalMO TOTAL report only all year
002Oxygen, dissolved [DO]DAILY MN report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedWKLY AVG <= 45 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Chlorine, total residualMO AVG <= .75 mg/L all year
002Coliform, fecal generalDAILY MX <= 400 #/100mL all year
002Flow, totalMO TOTAL report only all year
A01BOD, 5-day, 20 deg. CMO AVG report only all year
A01Solids, total suspendedMO AVG report only all year
A01Nitrogen, ammonia total [as N]DAILY MX report only all year
A01Coliform, fecal generalDAILY MX <= 400 #/100mL all year
A01Flow, totalMO TOTAL report only all year
B01Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
B01Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
B01pHMINIMUM >= 6 SU all year
B01pHMAXIMUM <= 9 SU all year
B01Solids, total suspendedMO AVG <= 37 mg/L all year
B01Solids, total suspendedWKLY AVG <= 45 mg/L all year
B01Solids, total suspendedMO AVG <= 167 lb/d all year
B01Solids, total suspendedWKLY AVG <= 203 lb/d all year
B01Nitrogen, ammonia total [as N]DAILY MX report only all year
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01Chlorine, total residualDAILY MX <= .05 mg/L all year
B01Coliform, fecal generalDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 113 lb/d all year
B01BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 180 lb/d all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year
INFLBOD, 5-day, 20 deg. CMO AVG report only all year
INFLSolids, total suspendedMO AVG report only all year
INFLFlow, in conduit or thru treatment plantMO AVG report only all year
INFLFlow, in conduit or thru treatment plantDAILY MX 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