EXELON GENERATION COMPANY LLC

NPDES permit IL0048313 · 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
0required values missing, on 0 form(s)
0of 88 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 (80)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO MAX report only all year
001pHMO MIN >= 6 SU all year
001pHMO MAX <= 9 SU all year
001Oil & Grease30DA AVG <= 15 mg/L all year
001Oil & GreaseDAILY MX <= 20 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .2 mg/L Jan, Jul
001Copper, total [as Cu]DAILY MX report only all year
001Zinc, total [as Zn]30DA AVG <= .213 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .433 mg/L all year
001Oxidants, total residualDAILY MX <= .05 mg/L all year
001Priority PollutantsDAILY MX report only all year
001Priority PollutantsDAILY 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 <= .05 mg/L all year
001Hydrazine30DA AVG <= .011 mg/L all year
001HydrazineDAILY MX <= .027 mg/L all year
002Solids, total suspended30DA AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 100 mg/L all year
002Oil & Grease30DA AVG <= 15 mg/L all year
002Oil & 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 plantDAILY MX report only all year
A01Solids, total suspended30DA AVG <= 15 mg/L all year
A01Solids, total suspendedDAILY MX <= 30 mg/L all year
A01Flow, in conduit or thru treatment plantMO AVG report only all year
A01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
B01BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
B01BOD, 5-day, 20 deg. C30DA AVG <= 5.3 lb/d all year
B01BOD, 5-day, 20 deg. CDAILY MX <= 10.5 lb/d all year
B01pHMINIMUM >= 6 SU all year
B01pHMAXIMUM <= 9 SU all year
B01Solids, total suspended30DA AVG <= 30 mg/L all year
B01Solids, total suspendedDAILY MX <= 60 mg/L all year
B01Solids, total suspended30DA AVG <= 5.3 lb/d all year
B01Solids, total suspendedDAILY MX <= 10.5 lb/d all year
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year
C01Solids, total suspended30DA AVG <= 15 mg/L all year
C01Solids, total suspendedDAILY MX <= 30 mg/L all year
C01Oil & Grease30DA AVG <= 15 mg/L all year
C01Oil & GreaseDAILY MX <= 20 mg/L all year
C01Flow, in conduit or thru treatment plantMO AVG report only all year
C01Flow, in conduit or thru treatment plantDAILY MX report only all year
D01Solids, total suspended30DA AVG <= 15 mg/L all year
D01Solids, total suspendedDAILY MX <= 30 mg/L all year
D01Oil & Grease30DA AVG <= 15 mg/L Jan, Jul
D01Oil & GreaseDAILY MX <= 20 mg/L Jan, Jul
D01Flow, in conduit or thru treatment plantMO AVG report only all year
D01Flow, in conduit or thru treatment plantDAILY MX report only all year
E01Solids, total suspended30DA AVG <= 15 mg/L all year
E01Solids, total suspendedDAILY MX <= 30 mg/L all year
E01Solids, total suspended30DA AVG <= 30 mg/L all year
E01Solids, total suspendedDAILY MX <= 100 mg/L all year
E01Oil & Grease30DA AVG <= 15 mg/L all year
E01Oil & GreaseDAILY MX <= 20 mg/L all year
E01Flow, in conduit or thru treatment plantMO AVG report only all year
E01Flow, in conduit or thru treatment plantDAILY MX report only all year
G01Solids, total suspended30DA AVG <= 15 mg/L all year
G01Solids, total suspendedDAILY MX <= 30 mg/L all year
G01Oil & Grease30DA AVG <= 15 mg/L all year
G01Oil & GreaseDAILY MX <= 20 mg/L all year
G01Chromium, hexavalent [as Cr]30DA AVG <= .1 mg/L all year
G01Chromium, hexavalent [as Cr]DAILY MX <= .2 mg/L all year
G01Chromium, total [as Cr]30DA AVG <= 1 mg/L all year
G01Chromium, total [as Cr]DAILY MX <= 2 mg/L all year
G01Copper, total [as Cu]30DA AVG <= .5 mg/L all year
G01Copper, total [as Cu]DAILY MX <= 1 mg/L all year
G01Iron, total [as Fe]DAILY MX <= 1 mg/L all year
G01Lead, total [as Pb]30DA AVG <= .2 mg/L all year
G01Lead, total [as Pb]DAILY MX <= .4 mg/L all year
G01Nickel, total [as Ni]30DA AVG <= 1 mg/L all year
G01Nickel, total [as Ni]DAILY MX <= 2 mg/L all year
G01Zinc, total [as Zn]30DA AVG <= 1 mg/L all year
G01Zinc, total [as Zn]DAILY MX <= 2 mg/L all year
G01Flow, in conduit or thru treatment plantMO AVG report only all year
G01Flow, 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