CASEYVILLE TOWNSHIP

NPDES permit IL0021083 · Major POTW · effective, expires 2026-11-30 · 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

3values over a limit
0required values missing, on 0 form(s)
3of 35 forms filed late

Last period with anything received: 2026-07-31. Most often over: Phosphorus, total [as P] (2), Zinc, total [as Zn] (1).

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 (94)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
001Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedMO AVG <= 1140 lb/d all year
001Solids, total suspendedDAILY MX <= 2280 lb/d all year
001Oil & GreaseDAILY MX report only all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Mar
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 3.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 7.2 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 6.9 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 152 lb/d Mar
001Nitrogen, ammonia total [as N]MO AVG <= 142 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 342 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 684 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 285 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 655 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 4 mg/L Mar
001Nitrogen, ammonia total [as N]WKLY AVG <= 380 lb/d Mar
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG <= 95 lb/d all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, free [amenable to chlorination]DAILY MX report only all year
001Cyanide, free [amenable to chlorination]DAILY MX report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Barium, total [as Ba]DAILY MX report only all year
001Barium, total [as Ba]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, dissolved [as Fe]DAILY MX report only all year
001Iron, dissolved [as Fe]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG <= .0384 mg/L all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG <= 3.65 lb/d all year
001Selenium, total [as Se]DAILY MX report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Phenolics, total recoverableDAILY MX report only all year
001Phenolics, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .038 mg/L all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Coliform, fecal generalDAILY MX <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 950 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 1900 lb/d 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]MO AVG report only all year
002Phosphorus, total [as P]MO AVG 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
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

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