CONSTELLATION GENERATION CO LLC

NPDES permit IL0048151 · Major NON-POTW · administratively continued, expires 2024-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-04-30 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 66 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 (49)

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
001Phosphorus, total [as P]QB report only Jan, Apr, Jul, Oct
001Oxidants, total residualDAILY MX <= .05 mg/L all year
001Temperature, length of excursionROLL AVG <= 87.6 hr/12mo 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
001Temperature Increase Deg. FMO MAX <= 5 deg F 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
B01pHMO MIN >= 6 SU all year
B01pHMO MAX <= 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 <= 15 lb/d all year
B01Solids, total suspendedDAILY MX <= 50 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
B01BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]DAILY MX <= 50 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]30DA AVG <= 13 lb/d all year
B01BOD, carbonaceous [5 day, 20 C]DAILY MX <= 42 lb/d all year
C01pHMO MIN >= 6 SU all year
C01pHMO MAX <= 9 SU all year
C01Solids, total suspended30DA AVG <= 15 mg/L all year
C01Solids, total suspendedDAILY MX <= 30 mg/L all year
C01Solids, total suspended30DA AVG <= 5 lb/d all year
C01Solids, total suspendedDAILY MX <= 17 lb/d all year
C01Oil and grease30DA AVG <= 15 mg/L all year
C01Oil and greaseDAILY MX <= 20 mg/L all year
C01Oil and grease30DA AVG <= 2.5 lb/d all year
C01Oil and greaseDAILY MX <= 3.34 lb/d 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
E01Solids, total suspended30DA AVG <= 15 mg/L all year
E01Solids, total suspendedDAILY MX <= 30 mg/L all year
E01Oil and grease30DA AVG <= 15 mg/L all year
E01Oil and 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
I01Solids, total suspended30DA AVG <= 15 mg/L all year
I01Solids, total suspendedDAILY MX <= 30 mg/L all year
I01Flow, in conduit or thru treatment plantMO AVG report only all year
I01Flow, 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