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Exelon Generation Company LLC

Electric Services, major discharger, Braceville, Illinois. NPDES permit IL0048321 expired Aug 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (13 values), outfall 002 form 0 quarterly (8 values), outfall 005 form 0 monthly (13 values), outfall 006 form 0 monthly (13 values), outfall A01 form 0 monthly (6 values), outfall C01 form 0 monthly (4 values), and 2 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 88 reports late

Limits in force (76)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec001
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov001
pHmonthly minimum≥ 6 SUall year001
pHmonthly maximum≤ 9 SUall year001
Oxidants, total residualmonthly averagereport only (mg/L)all year001
Oxidants, total residualdaily maximum≤ .05 mg/Lall year001
Temperature, length of excursionannual total≤ 87.6 hr/12moall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
Temperature Increase Deg. Fmonthly maximum≤ 5 deg Fall year001
Chlorination durationdaily maximumreport only (min)all year001
Chlorine usagemonthly averagereport only (lb/d)all year001
Chlorine usagedaily maximumreport only (lb/d)all year001
Oil & Grease30-day average≤ 15 mg/Lall year002
Oil & Grease30-day average≤ 15 mg/Lall year002
Oil & Greasedaily maximum≤ 30 mg/Lall year002
Oil & Greasedaily maximum≤ 30 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec005
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov005
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all year005
pHmonthly minimum≥ 6 SUall year005
pHmonthly maximum≤ 9 SUall year005
Oxidants, total residualmonthly averagereport only (mg/L)all year005
Oxidants, total residualdaily maximum≤ .05 mg/Lall year005
Temperature, length of excursionannual total≤ 87.6 hr/12moall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Chlorine, total residualdaily maximum≤ .2 mg/Lall year005
Chlorination durationdaily maximumreport only (min)all year005
Chlorine usagemonthly averagereport only (lb/d)all year005
Chlorine usagedaily maximumreport only (lb/d)all year005
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec006
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov006
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all year006
pHmonthly minimum≥ 6 SUall year006
pHmonthly maximum≤ 9 SUall year006
Oxidants, total residualmonthly averagereport only (mg/L)all year006
Oxidants, total residualdaily maximum≤ .05 mg/Lall year006
Temperature, length of excursionannual total≤ 87.6 hr/12moall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Chlorine, total residualdaily maximum≤ .2 mg/Lall year006
Chlorination durationdaily maximumreport only (min)all year006
Chlorine usagemonthly averagereport only (lb/d)all year006
Chlorine usagedaily maximumreport only (lb/d)all year006
Solids, total suspended30-day average≤ 15 mg/Lall yearA01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearA01
Oil & Grease30-day average≤ 15 mg/Lall yearA01
Oil & Greasedaily maximum≤ 20 mg/Lall yearA01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearA01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearA01
Solids, total suspended30-day average≤ 15 mg/Lall yearC01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearC01
Oil & Grease30-day average≤ 15 mg/LJan, JulC01
Oil & Greasedaily maximum≤ 20 mg/LJan, JulC01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearC01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearC01
Solids, total suspended30-day average≤ 15 mg/Lall yearD01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearD01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearD01
Solids, total suspended30-day average≤ 15 mg/Lall yearF01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearF01
Oil & Grease30-day average≤ 15 mg/Lall yearF01
Oil & Greasedaily maximum≤ 20 mg/Lall yearF01
Copper, total [as Cu]30-day averagereport only (mg/L)all yearF01
Copper, total [as Cu]daily maximumreport only (mg/L)all yearF01
Iron, total [as Fe]30-day average≤ 1 mg/Lall yearF01
Iron, total [as Fe]daily maximum≤ 1 mg/Lall yearF01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearF01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearF01

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

Same industry: the 45 Electric Services permits in Illinois.

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