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Constellation Energy Generation LLC

Electric Services, major discharger, Cordova, Illinois. NPDES permit IL0005037, in force until Mar 31, 2031. Last 12 months: no values over a limit, 3 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (12 values), outfall A02 form 0 monthly (5 values), outfall B01 form 0 monthly (10 values), outfall A02 form P quarterly, outfall B01 form P quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 48 reports late

Limits in force (119)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximum≤ 68 deg FNov001
Temperature, water deg. fahrenheitdaily maximum≤ 78 deg FOct001
Temperature, water deg. fahrenheitdaily maximum≤ 88 deg FJun, Sep001
Temperature, water deg. fahrenheitdaily maximum≤ 48 deg FJan, Feb001
Temperature, water deg. fahrenheitdaily maximum≤ 60 deg FMar001
Temperature, water deg. fahrenheitdaily maximum≤ 71 deg FApr001
Temperature, water deg. fahrenheitdaily maximum≤ 89 deg FJul, Aug001
Temperature, water deg. fahrenheitdaily maximum≤ 55 deg FDec001
Temperature, water deg. fahrenheitdaily maximum≤ 81 deg FMay001
Temperature, water deg. fahrenheitdaily maximum≤ 5 deg Fall year001
pHmonthly minimum≥ 6 SUall year001
pHmonthly maximum≤ 9 SUall year001
Zinc, total [as Zn]quarterly averagereport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total [as Zn]quarterly maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Temperature, length of excursionmonthly totalreport only (hr/mo)all year001
Temperature, length of excursionannual total≤ 219 hr/moall 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≤ .05 mg/Lall year001
Solids, total suspended30-day average≤ 15 mg/Lall yearA02
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearA02
Boron, total [as B]daily maximumreport only (mg/L)all yearA02
Oil and grease30-day average≤ 15 mg/LJan, JulA02
Oil and greasedaily maximum≤ 20 mg/LJan, JulA02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearA02
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearA02
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearA02
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearA02
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearA02
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearA02
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearA02
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearA02
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearA02
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearA02
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearA02
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearA02
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearA02
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearA02
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearA02
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearA02
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearA02
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearA02
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearA02
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearA02
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearA02
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearA02
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearA02
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearA02
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearA02
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearA02
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearA02
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearA02
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearA02
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearA02
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearA02
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearA02
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearA02
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearA02
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearA02
PFAS Sumdaily maximumreport only (ng/L)all yearA02
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearA02
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearA02
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearA02
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearA02
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearA02
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearA02
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearA02
Solids, total suspended30-day average≤ 15 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearB01
Solids, total suspended30-day average≤ 19 lb/dall yearB01
Solids, total suspendeddaily maximum≤ 39 lb/dall yearB01
Oil and grease30-day average≤ 15 mg/Lall yearB01
Oil and greasedaily maximum≤ 20 mg/Lall yearB01
Oil and grease30-day average≤ 19 lb/dall yearB01
Oil and greasedaily maximum≤ 26 lb/dall yearB01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB01
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearB01
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearB01
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearB01
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearB01
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearB01
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearB01
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearB01
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearB01
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearB01
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearB01
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearB01
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearB01
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearB01
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearB01
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearB01
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearB01
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearB01
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearB01
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearB01
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearB01
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearB01
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearB01
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearB01
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearB01
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearB01
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearB01
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearB01
PFAS Sumdaily maximumreport only (ng/L)all yearB01
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearB01
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearB01
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearB01
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearB01
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearB01
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearB01
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearB01

New limits from Apr 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.038 mg/Ltighter0.02 mg/L (12 values, 12 below detection)—

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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0005037 · MCP: https://passage-data.com/mcp