EXXONMOBIL OIL CORPORATION

NPDES permit IL0002861 · Major NON-POTW · effective, expires 2026-09-30 · 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

12values over a limit
0required values missing, on 0 form(s)
10of 101 forms filed late

Last period with anything received: 2026-07-31. Most often over: Temperature, water deg. fahrenheit (11), Oil and grease (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 (121)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 20 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 40 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 584 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 1435 lb/d all year
001Oxygen demand, chem. [high level] [COD]30DA AVG <= 14164 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 27295 lb/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 25 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Solids, total suspended30DA AVG <= 730 lb/d all year
001Solids, total suspendedDAILY MX <= 1793 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 108 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 252 lb/d all year
001Cyanide, total [as CN]30DA AVG <= .1 mg/L all year
001Cyanide, total [as CN]DAILY MX <= .2 mg/L all year
001Cyanide, total [as CN]30DA AVG <= 2.9 lb/d all year
001Cyanide, total [as CN]DAILY MX <= 7.2 lb/d all year
001Sulfide, total [as S]30DA AVG <= 11 lb/d all year
001Sulfide, total [as S]DAILY MX <= 24 lb/d all year
001Fluoride, total [as F]30DA AVG <= 15 mg/L all year
001Fluoride, total [as F]DAILY MX <= 30 mg/L all year
001Fluoride, total [as F]30DA AVG <= 438 lb/d all year
001Fluoride, total [as F]DAILY MX <= 1076 lb/d all year
001Chromium, hexavalent [as Cr]30DA AVG <= .1 mg/L all year
001Chromium, hexavalent [as Cr]DAILY MX <= .2 mg/L all year
001Chromium, hexavalent [as Cr]30DA AVG <= .78 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= 1.8 lb/d all year
001Chromium, total [as Cr]30DA AVG <= 1 mg/L all year
001Chromium, total [as Cr]DAILY MX <= 2 mg/L all year
001Chromium, total [as Cr]30DA AVG <= 9.7 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 28 lb/d all year
001Oil and grease30DA AVG <= 15 mg/L all year
001Oil and greaseDAILY MX <= 30 mg/L all year
001Oil and grease30DA AVG <= 438 lb/d all year
001Oil and greaseDAILY MX <= 1076 lb/d all year
001Phenolics, total recoverable30DA AVG <= .3 mg/L all year
001Phenolics, total recoverableDAILY MX <= .6 mg/L all year
001Phenolics, total recoverable30DA AVG <= 8.2 lb/d all year
001Phenolics, total recoverableDAILY MX <= 27 lb/d 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
002Carbon, tot organic [TOC]DAILY MX <= 5 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
003Oil and greaseDAILY MX <= 15 mg/L all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004pHDAILY MN >= 6 SU all year
004pHDAILY MX <= 9 SU all year
004Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
004Oil and greaseDAILY MX <= 15 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
005pHDAILY MN >= 6 SU all year
005pHDAILY MX <= 9 SU all year
005Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
005Oil and greaseDAILY MX <= 15 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
008pHDAILY MN >= 6 SU all year
008pHDAILY MX <= 9 SU all year
008Carbon, tot organic [TOC]DAILY MX <= 110 mg/L all year
008Oil and greaseDAILY MX <= 15 mg/L all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
A01Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
A03pHDAILY MN >= 6 SU all year
A03pHDAILY MX <= 9 SU all year
A03Solids, total suspended30DA AVG <= 15 mg/L all year
A03Solids, total suspendedDAILY MX <= 30 mg/L all year
A03Iron, total [as Fe]30DA AVG <= 2 mg/L all year
A03Iron, total [as Fe]DAILY MX <= 4 mg/L all year
A03Oil and grease30DA AVG <= 15 mg/L all year
A03Oil and greaseDAILY MX <= 30 mg/L all year
A03Benzene, ethylbenzene, toluene, xylene combinationDAILY MX <= .75 mg/L all year
A03BenzeneDAILY MX <= .05 mg/L all year
A03Phenols30DA AVG <= .3 mg/L all year
A03PhenolsDAILY MX <= .6 mg/L all year
A03Flow, in conduit or thru treatment plantMO AVG report only all year
COMTemperature, water deg. fahrenheitMO MAX <= 63 deg F Jan, Feb, Mar, Dec
COMTemperature, water deg. fahrenheitMO MAX <= 93 deg F Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
COMSulfate [as S]DAILY MX report only all year
COMpHMINIMUM >= 6 SU all year
COMpHMAXIMUM <= 9 SU all year
COMNitrogen, total [as N]DAILY MX report only all year
COMPhosphorus, total [as P]DAILY MX report only all year
COMCyanide, weak acid, dissociableDAILY MX report only all year
COMCyanide, weak acid, dissociableDAILY MX report only all year
COMCyanide, total [as CN]DAILY MX report only all year
COMCyanide, total [as CN]DAILY MX report only all year
COMChloride [as Cl]DAILY MX report only all year
COMArsenic, total [as As]DAILY MX report only all year
COMArsenic, total [as As]DAILY MX report only all year
COMBarium, total [as Ba]DAILY MX report only all year
COMBarium, total [as Ba]DAILY MX report only all year
COMCadmium, total [as Cd]DAILY MX report only all year
COMCadmium, total [as Cd]DAILY MX report only all year
COMCopper, total [as Cu]DAILY MX report only all year
COMCopper, total [as Cu]DAILY MX report only all year
COMIron, total [as Fe]DAILY MX report only all year
COMIron, total [as Fe]DAILY MX report only all year
COMIron, dissolved [as Fe]DAILY MX report only all year
COMIron, dissolved [as Fe]DAILY MX report only all year
COMLead, total [as Pb]DAILY MX report only all year
COMLead, total [as Pb]DAILY MX report only all year
COMManganese, total [as Mn]DAILY MX report only all year
COMManganese, total [as Mn]DAILY MX report only all year
COMNickel, total [as Ni]DAILY MX report only all year
COMNickel, total [as Ni]DAILY MX report only all year
COMSilver, total [as Ag]DAILY MX report only all year
COMSilver, total [as Ag]DAILY MX report only all year
COMVanadium, total [as V]DAILY MX report only all year
COMVanadium, total [as V]DAILY MX report only all year
COMZinc, total [as Zn]DAILY MX report only all year
COMZinc, total [as Zn]DAILY MX report only all year
COMSelenium, total [as Se]DAILY MX report only all year
COMSelenium, total [as Se]DAILY MX report only all year
COMChlorine, total residualDAILY MX <= .05 mg/L all year
COMSolids, total dissolvedDAILY MX <= 385000 lb/d Jan, Feb, Mar, Apr, Nov, Dec
COMMercury, total [as Hg]SX report only Jan, Jul

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