ILLINOIS POWER GENERATING COMPANY

NPDES permit IL0000108 · Major NON-POTW · administratively continued, expires 2021-09-30 · 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.

This permit expired on 2021-09-30 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 68 forms filed late

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

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (152)

OutfallParameterStatisticLimitMonths
002pHMO MIN >= 6 SU all year
002pHMO MIN >= 6 SU all year
002pHMINIMUM >= 6.5 SU all year
002pHMINIMUM >= 6.5 SU all year
002pHMO MAX <= 9 SU all year
002pHMO MAX <= 9 SU all year
002pHMAXIMUM <= 9 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG <= 35 mg/L all year
002Solids, total suspended30DA AVG <= 35 mg/L all year
002Solids, total suspended30DA AVG <= 15 mg/L all year
002Solids, total suspended30DA AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 50 mg/L all year
002Solids, total suspendedDAILY MX <= 50 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Boron, total [as B]DAILY MX <= 1300 mg/L all year
002Boron, total [as B]DAILY MX <= 1300 mg/L all year
002Iron, total [as Fe]30DA AVG <= 2 mg/L all year
002Iron, total [as Fe]30DA AVG <= 2 mg/L all year
002Iron, total [as Fe]DAILY MX <= 4 mg/L all year
002Iron, total [as Fe]DAILY MX <= 4 mg/L all year
002Manganese, total [as Mn]30DA AVG <= 1 mg/L all year
002Manganese, total [as Mn]30DA AVG <= 1 mg/L all year
002Manganese, total [as Mn]DAILY MX <= 1.3 mg/L all year
002Manganese, total [as Mn]DAILY MX <= 1.3 mg/L all year
002Oil and grease30DA AVG <= 15 mg/L all year
002Oil and grease30DA AVG <= 15 mg/L all year
002Oil and grease30DA AVG <= 15 mg/L all year
002Oil and grease30DA AVG <= 15 mg/L all year
002Oil and greaseDAILY MX <= 20 mg/L all year
002Oil and greaseDAILY MX <= 20 mg/L all year
002Oil and greaseDAILY MX <= 20 mg/L all year
002Oil and greaseDAILY MX <= 20 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only 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
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Solids, total dissolvedDAILY MX <= 1.8 mg/L all year
002Solids, total dissolvedDAILY MX <= 1.8 mg/L all year
020Temperature, water deg. fahrenheitMO AVG report only Jun, Jul, Aug, Sep
020Temperature, water deg. fahrenheitMO AVG report only Jun, Jul, Aug, Sep
020Temperature, water deg. fahrenheitMO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
020Temperature, water deg. fahrenheitMO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
020Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
020Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
020Temperature, water deg. fahrenheitDAILY MX report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
020Temperature, water deg. fahrenheitDAILY MX report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
020pHMO MIN >= 6 SU all year
020pHMO MIN >= 6 SU all year
020pHMO MIN >= 6.5 SU all year
020pHMO MIN >= 6.5 SU all year
020pHMO MAX <= 9 SU all year
020pHMO MAX <= 9 SU all year
020pHMO MAX <= 9 SU all year
020pHMO MAX <= 9 SU all year
020Chloride [as Cl]MO AVG report only Jun, Dec
020Chloride [as Cl]MO AVG report only Jun, Dec
020Copper, total [as Cu]30DA AVG <= .017 mg/L all year
020Copper, total [as Cu]30DA AVG <= .017 mg/L all year
020Copper, total [as Cu]DAILY MX <= .0258 mg/L all year
020Copper, total [as Cu]DAILY MX <= .0258 mg/L all year
020Manganese, total [as Mn]MO AVG report only Jun, Dec
020Manganese, total [as Mn]MO AVG report only Jun, Dec
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year
020Chlorine, total residualINST MAX <= .2 mg/L all year
020Chlorine, total residualINST MAX <= .2 mg/L all year
020Mercury, total [as Hg]ANNL AVG <= 12 ng/L all year
020Mercury, total [as Hg]ANNL AVG <= 12 ng/L all year
C20Solids, total suspended30DA AVG <= 15 mg/L all year
C20Solids, total suspendedDAILY MX <= 30 mg/L all year
C20Oil and grease30DA AVG <= 15 mg/L all year
C20Oil and greaseDAILY MX <= 20 mg/L all year
C20Flow, in conduit or thru treatment plantMO AVG report only all year
C20Flow, in conduit or thru treatment plantDAILY MX report only all year
D20BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
D20BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
D20pHMO MIN >= 6.5 SU all year
D20pHMO MAX <= 9 SU all year
D20Solids, total suspended30DA AVG <= 37 mg/L all year
D20Solids, total suspendedDAILY MX <= 74 mg/L all year
D20Flow, in conduit or thru treatment plantMO AVG report only all year
D20Flow, in conduit or thru treatment plantDAILY MX report only all year
D20Coliform, fecal generalDAILY MX report only all year
E20Solids, total suspended30DA AVG <= 15 mg/L all year
E20Solids, total suspendedDAILY MX <= 30 mg/L all year
E20Oil and grease30DA AVG <= 15 mg/L all year
E20Oil and greaseDAILY MX <= 20 mg/L all year
E20Flow, in conduit or thru treatment plantMO AVG report only all year
E20Flow, in conduit or thru treatment plantDAILY MX report only all year
K02Oil & GreaseDAILY MX report only all year
K02Oil & GreaseDAILY MX report only all year
K02Cyanide, total [as CN]DAILY MX report only all year
K02Cyanide, total [as CN]DAILY MX report only all year
K02Cyanide, free [amenable to chlorination]DAILY MX report only all year
K02Cyanide, free [amenable to chlorination]DAILY MX report only all year
K02Fluoride, total [as F]DAILY MX report only all year
K02Fluoride, total [as F]DAILY MX report only all year
K02Arsenic, total [as As]DAILY MX report only all year
K02Arsenic, total [as As]DAILY MX report only all year
K02Barium, total [as Ba]DAILY MX report only all year
K02Barium, total [as Ba]DAILY MX report only all year
K02Cadmium, total [as Cd]DAILY MX report only all year
K02Cadmium, total [as Cd]DAILY MX report only all year
K02Chromium, hexavalent [as Cr]DAILY MX report only all year
K02Chromium, hexavalent [as Cr]DAILY MX report only all year
K02Chromium, total [as Cr]DAILY MX report only all year
K02Chromium, total [as Cr]DAILY MX report only all year
K02Copper, total [as Cu]DAILY MX report only all year
K02Copper, total [as Cu]DAILY MX report only all year
K02Iron, total [as Fe]DAILY MX report only all year
K02Iron, total [as Fe]DAILY MX report only all year
K02Iron, dissolved [as Fe]DAILY MX report only all year
K02Iron, dissolved [as Fe]DAILY MX report only all year
K02Lead, total [as Pb]DAILY MX report only all year
K02Lead, total [as Pb]DAILY MX report only all year
K02Manganese, total [as Mn]DAILY MX report only all year
K02Manganese, total [as Mn]DAILY MX report only all year
K02Nickel, total [as Ni]DAILY MX report only all year
K02Nickel, total [as Ni]DAILY MX report only all year
K02Silver, total [as Ag]DAILY MX report only all year
K02Silver, total [as Ag]DAILY MX report only all year
K02Zinc, total [as Zn]DAILY MX report only all year
K02Zinc, total [as Zn]DAILY MX report only all year
K02Selenium, total [as Se]DAILY MX report only all year
K02Selenium, total [as Se]DAILY MX report only all year
K02Phenolics, total recoverableDAILY MX report only all year
K02Phenolics, total recoverableDAILY MX report only all year
K02Mercury, total [as Hg]DAILY MX report only all year
K02Mercury, total [as Hg]DAILY MX report only all year
K20Sulfate [as S]30DA AVG report only all year
K20Sulfate [as S]DAILY MX report only all year
K20pHMO MIN >= 6.5 SU all year
K20pHMO MAX <= 9 SU all year
K20Solids, total suspended30DA AVG <= 15 mg/L all year
K20Solids, total suspendedDAILY MX <= 30 mg/L all year
K20Boron, total [as B]30DA AVG report only all year
K20Boron, total [as B]DAILY MX report only all year
K20Flow, in conduit or thru treatment plantMO AVG report only all year
K20Flow, in conduit or thru treatment plantDAILY MX report only all year
K20Solids, total dissolvedDAILY MX <= 500 mg/L 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