EXELON GENERATION COMPANY, LLC

NPDES permit IL0002224 · Major NON-POTW · administratively continued, expires 2021-08-31 · 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 2021-08-31 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
6required values missing, on 1 form(s)
1of 77 forms filed late

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

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (54)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO MAX <= 93 deg F Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Temperature, water deg. fahrenheitMO MAX <= 63 deg F Jan, Feb, Mar, Dec
001pHMO MIN >= 6 SU all year
001pHMO MAX <= 9 SU all year
001Solids, total suspended30DA AVG <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Oil & Grease30DA AVG <= 15 mg/L all year
001Oil & GreaseDAILY MX <= 20 mg/L 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 <= .05 mg/L all year
002Temperature, water deg. fahrenheitMO MAX <= 93 deg F Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
002Temperature, water deg. fahrenheitMO MAX <= 63 deg F Jan, Feb, Mar, Dec
002pHMO MIN >= 6 SU all year
002pHMO MAX <= 9 SU 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
002Chlorine, total residualDAILY MX <= .05 mg/L all year
003BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
003BOD, 5-day, 20 deg. C30DA AVG <= 7.8 lb/d all year
003BOD, 5-day, 20 deg. CDAILY MX <= 38 lb/d all year
003pHMO MIN >= 6 SU all year
003pHMO MAX <= 9 SU all year
003Solids, total suspended30DA AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 60 mg/L all year
003Solids, total suspended30DA AVG <= 7.8 lb/d all year
003Solids, total suspendedDAILY MX <= 38 lb/d 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
003Chlorine, total residualDAILY MX <= .05 mg/L all year
003Coliform, fecal generalDAILY MX <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
004Temperature, water deg. fahrenheitMO MAX report only all year
004pHMO MIN >= 6 SU all year
004pHMO MAX <= 9 SU all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chlorine, total residualDAILY MX <= .05 mg/L all year
B02Solids, total suspended30DA AVG <= 15 mg/L all year
B02Solids, total suspendedDAILY MX <= 30 mg/L all year
B02Oil and grease30DA AVG <= 10 mg/L all year
B02Oil and greaseDAILY MX <= 20 mg/L all year
B02Flow, in conduit or thru treatment plantMO AVG report only all year
B02Flow, in conduit or thru treatment plantDAILY MX report only all year
C02Solids, total suspended30DA AVG <= 15 mg/L all year
C02Solids, total suspendedDAILY MX <= 30 mg/L all year
C02Oil and grease30DA AVG <= 15 mg/L all year
C02Oil and greaseDAILY MX <= 20 mg/L all year
C02Flow, in conduit or thru treatment plantMO AVG report only all year
C02Flow, in conduit or thru treatment plantDAILY MX report only all year
D02Solids, total suspended30DA AVG <= 15 mg/L all year
D02Solids, total suspendedDAILY MX <= 30 mg/L all year
D02Flow, in conduit or thru treatment plantMO AVG report only all year
D02Flow, 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