EXELON GENERATION COMPANY LLC

NPDES permit IL0036919 · Major NON-POTW · administratively continued, expires 2025-03-31 · 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 2025-03-31 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

2values over a limit
0required values missing, on 0 form(s)
1of 110 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (80)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitMX DA AV <= 110.7 deg F all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Phosphorus, total [as P]DAILY MX report only Jan, Apr, Jul, Oct
002Zinc, total [as Zn]DAILY MX report only Jan, Apr, Jul, Oct
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
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspended30DA AVG <= 15 mg/L all year
003Solids, total suspendedDAILY MX <= 30 mg/L all year
003Oil & Grease30DA AVG <= 15 mg/L all year
003Oil & GreaseDAILY MX <= 20 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
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspended30DA AVG <= 15 mg/L all year
004Solids, total suspendedDAILY MX <= 30 mg/L all year
004Oil and grease30DA AVG <= 15 mg/L all year
004Oil and greaseDAILY MX <= 20 mg/L 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
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspended30DA AVG <= 15 mg/L all year
005Solids, total suspendedDAILY MX <= 30 mg/L all year
005Oil and grease30DA AVG <= 15 mg/L all year
005Oil and greaseDAILY MX <= 20 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
007pHMINIMUM >= 6 SU all year
007pHMINIMUM >= 6 SU all year
007pHMAXIMUM <= 9 SU all year
007pHMAXIMUM <= 9 SU all year
007Phosphorus, total [as P]DAILY MX report only Jan, Apr, Jul, Oct
007Phosphorus, total [as P]DAILY MX report only Jan, Apr, Jul, Oct
007Zinc, total [as Zn]30DA AVG <= .0668 mg/L all year
007Zinc, total [as Zn]30DA AVG <= .0668 mg/L all year
007Zinc, total [as Zn]30DA AVG report only all year
007Zinc, total [as Zn]30DA AVG report only all year
007Zinc, total [as Zn]DAILY MX <= .2574 mg/L all year
007Zinc, total [as Zn]DAILY MX <= .2574 mg/L all year
007Zinc, total [as Zn]DAILY MX report only all year
007Zinc, total [as Zn]DAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residualDAILY MX <= .05 mg/L all year
007Chlorine, total residualDAILY MX <= .05 mg/L all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
015pHMINIMUM >= 6 SU all year
015pHMAXIMUM <= 9 SU all year
015Solids, total suspended30DA AVG <= 15 mg/L all year
015Solids, total suspendedDAILY MX <= 30 mg/L all year
015Flow, in conduit or thru treatment plantMO AVG report only all year
015Flow, in conduit or thru treatment plantDAILY MX report only all year
A02BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
A02BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
A02BOD, 5-day, 20 deg. C30DA AVG <= 22 lb/d all year
A02BOD, 5-day, 20 deg. CDAILY MX <= 75 lb/d all year
A02Solids, total suspended30DA AVG <= 30 mg/L all year
A02Solids, total suspendedDAILY MX <= 60 mg/L all year
A02Solids, total suspended30DA AVG <= 22 lb/d all year
A02Solids, total suspendedDAILY MX <= 75 lb/d all year
A02Flow, in conduit or thru treatment plantMO AVG report only all year
A02Flow, in conduit or thru treatment plantDAILY MX report only all year
A02Coliform, fecal generalDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
B02Solids, total suspended30DA AVG <= 15 mg/L all year
B02Solids, total suspendedDAILY MX <= 30 mg/L all year
B02Oil and grease30DA AVG <= 15 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

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