JOLIET, CITY OF

NPDES permit IL0033553 · Major POTW · administratively continued, expires 2025-10-31 · 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 2025-10-31 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)
2of 24 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 (169)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO MAX report only all year
001Specific conductanceDAILY MX report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Alkalinity, total [as CaCO3]DAILY MX report only all year
001Solids, total suspendedMO AVG <= 25 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 5838 lb/d all year
001Solids, total suspendedWKLY AVG <= 10508 lb/d all year
001Oil & GreaseDAILY MX report only all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Feb
001Nitrogen, ammonia total [as N]MO AVG <= 2.9 mg/L Mar
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Sep
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Aug
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jul
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jun
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Dec
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Nov
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jan
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Oct
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 934 lb/d Feb
001Nitrogen, ammonia total [as N]MO AVG <= 677 lb/d Mar
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Sep
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Aug
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Jul
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Jun
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 934 lb/d Dec
001Nitrogen, ammonia total [as N]MO AVG <= 934 lb/d Nov
001Nitrogen, ammonia total [as N]MO AVG <= 934 lb/d Jan
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 1868 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 1868 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 1868 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1868 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 1868 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 701 lb/d Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 7.3 mg/L Mar
001Nitrogen, ammonia total [as N]WKLY AVG <= 1705 lb/d Mar
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG <= 234 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
001Chloride [as Cl]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
001Beryllium, total [as Be]DAILY MX report only all year
001Beryllium, total [as Be]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
001Thallium, total [as Tl]DAILY MX report only all year
001Thallium, total [as Tl]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]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Antimony, total [as Sb]DAILY MX report only all year
001Antimony, total [as Sb]DAILY MX report only 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
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 4670 lb/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 9341 lb/d all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFPhosphorus, total [as P]MO AVG report only all year
INFPhosphorus, total [as P]DAILY MX 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
INFLOil & GreaseDAILY MX report only all year
INFLOil & GreaseDAILY MX report only all year
INFLCyanide, total [as CN]DAILY MX report only all year
INFLCyanide, total [as CN]DAILY MX report only all year
INFLCyanide, free [amenable to chlorination]DAILY MX report only all year
INFLCyanide, free [amenable to chlorination]DAILY MX report only all year
INFLFluoride, total [as F]DAILY MX report only all year
INFLFluoride, total [as F]DAILY MX report only all year
INFLArsenic, total [as As]DAILY MX report only all year
INFLArsenic, total [as As]DAILY MX report only all year
INFLBarium, total [as Ba]DAILY MX report only all year
INFLBarium, total [as Ba]DAILY MX report only all year
INFLBeryllium, total [as Be]DAILY MX report only all year
INFLBeryllium, total [as Be]DAILY MX report only all year
INFLCadmium, total [as Cd]DAILY MX report only all year
INFLCadmium, total [as Cd]DAILY MX report only all year
INFLChromium, hexavalent [as Cr]DAILY MX report only all year
INFLChromium, hexavalent [as Cr]DAILY MX report only all year
INFLChromium, total [as Cr]DAILY MX report only all year
INFLChromium, total [as Cr]DAILY MX report only all year
INFLCopper, total [as Cu]DAILY MX report only all year
INFLCopper, total [as Cu]DAILY MX report only all year
INFLIron, total [as Fe]DAILY MX report only all year
INFLIron, total [as Fe]DAILY MX report only all year
INFLIron, dissolved [as Fe]DAILY MX report only all year
INFLIron, dissolved [as Fe]DAILY MX report only all year
INFLLead, total [as Pb]DAILY MX report only all year
INFLLead, total [as Pb]DAILY MX report only all year
INFLManganese, total [as Mn]DAILY MX report only all year
INFLManganese, total [as Mn]DAILY MX report only all year
INFLThallium, total [as Tl]DAILY MX report only all year
INFLThallium, total [as Tl]DAILY MX report only all year
INFLNickel, total [as Ni]DAILY MX report only all year
INFLNickel, total [as Ni]DAILY MX report only all year
INFLSilver, total [as Ag]DAILY MX report only all year
INFLSilver, total [as Ag]DAILY MX report only all year
INFLZinc, total [as Zn]DAILY MX report only all year
INFLZinc, total [as Zn]DAILY MX report only all year
INFLAntimony, total [as Sb]DAILY MX report only all year
INFLAntimony, total [as Sb]DAILY MX report only all year
INFLSelenium, total [as Se]DAILY MX report only all year
INFLSelenium, total [as Se]DAILY MX report only all year
INFLPhenolics, total recoverableDAILY MX report only all year
INFLPhenolics, total recoverableDAILY MX report only all year
INFLMercury, total [as Hg]DAILY MX report only all year
INFLMercury, total [as Hg]DAILY MX report only all year

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