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Constellation Energy Generation LLC

Electric Services, major discharger, Pottstown, Pennsylvania. NPDES permit PA0051926, in force until Apr 30, 2031. Last 12 months: no values over a limit, 346 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (28 values), outfall 003 form A monthly (8 values), outfall 005 form A monthly (8 values), outfall 012 form A monthly (12 values), outfall 020 form A monthly (6 values), outfall 021 form A monthly (10 values), and 13 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 159 reports late

Limits in force (195)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Temperature, water deg. fahrenheitinstantaneous maximum≤ 110 deg Fall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 60 mg/Lall year001
Chromium, total [as Cr]monthly average≤ .2 mg/Lall year001
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year001
Copper, total [as Cu]monthly averagereport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]monthly averagereport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]monthly averagereport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]monthly average≤ 1 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year001
Aluminum, total [as Al]monthly average≤ 4.97 mg/Lall year001
Aluminum, total [as Al]daily maximum≤ 7.75 mg/Lall year001
Oxidants, total residualdaily maximum≤ .2 mg/Lall 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
Acrylamidequarterly averagereport only (mg/L)all year001
Acrylamidedaily maximumreport only (mg/L)all year001
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year001
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year001
PCBs Wet Weather Analysisdaily maximumreport only (ng/L)all year001
PCBs Dry Weather Analysisdaily maximumreport only (ng/L)all year001
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year001
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year001
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)all year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Bromide [as Br]quarterly averagereport only (mg/L)all year001
Bromide [as Br]daily maximumreport only (mg/L)all year001
Coliform, fecal generalquarterly averagereport only (#/100mL)all year001
Coliform, fecal generaldaily maximumreport only (#/100mL)all year001
TU Static 7Day Chronic Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year001
Static 7Day Chronic Pimephales Promelasdaily maximumreport only (tox chronic)all year001
pHdaily maximumreport only (SU)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Oil & Greasedaily maximumreport only (mg/L)all year002
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Copper, total [as Cu]daily maximumreport only (mg/L)all year002
Iron, total [as Fe]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Temperature, water deg. fahrenheitinstantaneous maximum≤ 110 deg Fall year003
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Solids, total suspendedmonthly averagereport only (mg/L)all year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Oxidants, total residualdaily maximum≤ .2 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Temperature, water deg. fahrenheitinstantaneous maximum≤ 110 deg Fall year005
pHinstantaneous minimum≥ 6 SUall year005
pHinstantaneous maximum≤ 9 SUall year005
Solids, total suspendedmonthly averagereport only (mg/L)all year005
Solids, total suspendeddaily maximumreport only (mg/L)all year005
Oxidants, total residualdaily maximum≤ .2 mg/Lall 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
pHdaily maximumreport only (SU)all year008
Solids, total suspendeddaily maximumreport only (mg/L)all year008
Oil & Greasedaily maximumreport only (mg/L)all year008
Nitrogen, total [as N]daily maximumreport only (mg/L)all year008
Phosphorus, total [as P]daily maximumreport only (mg/L)all year008
Copper, total [as Cu]daily maximumreport only (mg/L)all year008
Iron, total [as Fe]daily maximumreport only (mg/L)all year008
Zinc, total [as Zn]daily maximumreport only (mg/L)all year008
pHinstantaneous minimumreport only (SU)all year012
pHinstantaneous maximumreport only (SU)all year012
Solids, total suspendedmonthly averagereport only (mg/L)all year012
Solids, total suspendeddaily maximum≤ 100 mg/Lall year012
Oil & Greasemonthly averagereport only (mg/L)all year012
Oil & Greasedaily maximumreport only (mg/L)all year012
Iron, total [as Fe]monthly averagereport only (mg/L)all year012
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year012
Iron, dissolved [as Fe]monthly averagereport only (mg/L)all year012
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year012
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year012
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year012
pHdaily maximumreport only (SU)all year019
Solids, total suspendeddaily maximumreport only (mg/L)all year019
Oil & Greasedaily maximumreport only (mg/L)all year019
Nitrogen, total [as N]daily maximumreport only (mg/L)all year019
Phosphorus, total [as P]daily maximumreport only (mg/L)all year019
Copper, total [as Cu]daily maximumreport only (mg/L)all year019
Iron, total [as Fe]daily maximumreport only (mg/L)all year019
Zinc, total [as Zn]daily maximumreport only (mg/L)all year019
pHinstantaneous minimum≥ 6 SUall year020
pHinstantaneous maximum≤ 9 SUall year020
Solids, total suspendedmonthly averagereport only (mg/L)all year020
Solids, total suspendeddaily maximum≤ 100 mg/Lall year020
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year020
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year020
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year021
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year021
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year021
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year021
pHdaily maximumreport only (SU)all year021
pHdaily maximumreport only (SU)all year021
Solids, total suspendeddaily maximumreport only (mg/L)all year021
Solids, total suspendeddaily maximumreport only (mg/L)all year021
Oil & Greasedaily maximumreport only (mg/L)all year021
Oil & Greasedaily maximumreport only (mg/L)all year021
Nitrogen, total [as N]daily maximumreport only (mg/L)all year021
Nitrogen, total [as N]daily maximumreport only (mg/L)all year021
Phosphorus, total [as P]daily maximumreport only (mg/L)all year021
Phosphorus, total [as P]daily maximumreport only (mg/L)all year021
Copper, total [as Cu]daily maximumreport only (mg/L)all year021
Copper, total [as Cu]daily maximumreport only (mg/L)all year021
Iron, total [as Fe]daily maximumreport only (mg/L)all year021
Iron, total [as Fe]daily maximumreport only (mg/L)all year021
Zinc, total [as Zn]daily maximumreport only (mg/L)all year021
Zinc, total [as Zn]daily maximumreport only (mg/L)all year021
pHdaily maximumreport only (SU)all year024
Solids, total suspendedmonthly average≤ 30 mg/Lall year024
Solids, total suspendeddaily maximum≤ 100 mg/Lall year024
Oil & Greasemonthly average≤ 15 mg/Lall year024
Oil & Greasedaily maximum≤ 20 mg/Lall year024
Copper, total [as Cu]monthly averagereport only (mg/L)all year024
Copper, total [as Cu]daily maximumreport only (mg/L)all year024
Acrylamidemonthly averagereport only (mg/L)all year024
Acrylamidedaily maximumreport only (mg/L)all year024
Solids, total dissolvedmonthly averagereport only (mg/L)all year024
Solids, total dissolveddaily maximumreport only (mg/L)all year024
pHdaily maximumreport only (SU)all year030
Solids, total suspendeddaily maximumreport only (mg/L)all year030
Oil & Greasedaily maximumreport only (mg/L)all year030
Nitrogen, total [as N]daily maximumreport only (mg/L)all year030
Phosphorus, total [as P]monthly averagereport only (mg/L)all year030
Phosphorus, total [as P]daily maximumreport only (mg/L)all year030
Phosphorus, total [as P]daily maximumreport only (mg/L)all year030
Copper, total [as Cu]daily maximumreport only (mg/L)all year030
Iron, total [as Fe]daily maximumreport only (mg/L)all year030
Zinc, total [as Zn]daily maximumreport only (mg/L)all year030
Solids, total dissolvedmonthly averagereport only (mg/L)all year030
Solids, total dissolveddaily maximumreport only (mg/L)all year030
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year031
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year031
Temperature, water deg. fahrenheitinstantaneous maximum≤ 110 deg Fall year031
pHinstantaneous minimum≥ 6 SUall year031
pHinstantaneous maximum≤ 9 SUall year031
Solids, total suspendedmonthly averagereport only (mg/L)all year031
Solids, total suspendeddaily maximumreport only (mg/L)all year031
Solids, total suspendedmonthly averagereport only (mg/L)all year031
Solids, total suspendeddaily maximumreport only (mg/L)all year031
Solids, total suspendedmonthly average≤ 30 mg/Lall year031
Solids, total suspendeddaily maximum≤ 60 mg/Lall year031
Chromium, total [as Cr]monthly average≤ .2 mg/Lall year031
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year031
Copper, total [as Cu]monthly averagereport only (mg/L)all year031
Copper, total [as Cu]daily maximumreport only (mg/L)all year031
Iron, total [as Fe]monthly averagereport only (mg/L)all year031
Iron, total [as Fe]daily maximumreport only (mg/L)all year031
Lead, total [as Pb]monthly averagereport only (mg/L)all year031
Lead, total [as Pb]daily maximumreport only (mg/L)all year031
Zinc, total [as Zn]monthly average≤ 1 mg/Lall year031
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year031
Aluminum, total [as Al]monthly average≤ 4.97 mg/Lall year031
Aluminum, total [as Al]daily maximum≤ 7.75 mg/Lall year031
Oxidants, total residualdaily maximum≤ .2 mg/Lall year031
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year031
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year031
Acrylamidemonthly averagereport only (mg/L)all year031
Acrylamidedaily maximumreport only (mg/L)all year031
Solids, total dissolvedmonthly averagereport only (mg/L)all year031
Solids, total dissolveddaily maximumreport only (mg/L)all year031
Bromide [as Br]monthly averagereport only (mg/L)all year031
Bromide [as Br]daily maximumreport only (mg/L)all year031
Coliform, fecal generalmonthly averagereport only (#/100mL)all year031
Coliform, fecal generaldaily maximumreport only (#/100mL)all year031
Solids, total suspendedmonthly average≤ 30 mg/Lall year201
Solids, total suspendeddaily maximum≤ 100 mg/Lall year201
Oil & Greasemonthly average≤ 15 mg/Lall year201
Oil & Greasedaily maximum≤ 20 mg/Lall year201
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year201
Solids, total suspendedmonthly average≤ 30 mg/Lall year301
Solids, total suspendeddaily maximum≤ 100 mg/Lall year301
Oil & Greasemonthly average≤ 15 mg/Lall year301
Oil & Greasedaily maximum≤ 20 mg/Lall year301
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year301
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year301
Phosphorus, total [as P]monthly averagereport only (mg/L)all year401
Phosphorus, total [as P]daily maximumreport only (mg/L)all year401
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year401
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year401

How strict are these limits?

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

Same industry: the 63 Electric Services permits in Pennsylvania.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0051926 · MCP: https://passage-data.com/mcp