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ST. Joseph Energy Center LLC

Electric Services, major discharger, New Carlisle, Indiana. NPDES permit IN0064122, in force until Mar 31, 2030. Last 12 months: over a limit once (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (25 values), outfall 101 form A monthly (8 values), outfall 102 form A monthly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 39 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
September 2026Toxicity [chronic], Ceriodaphnia dubia, maximum2 tox chronic≤ 1 tox chronic100%

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmaximum weekly average≤ 80.6 deg FMar001
Temperature, water deg. fahrenheitmaximum weekly average≤ 67.3 deg FFeb001
Temperature, water deg. fahrenheitmaximum weekly average≤ 68.7 deg FJan001
Temperature, water deg. fahrenheitmaximum weekly average≤ 80.6 deg FApr, May, Oct, Nov001
Temperature, water deg. fahrenheitmaximum weekly average≤ 90 deg FJun–Sep001
Temperature, water deg. fahrenheitmaximum weekly average≤ 68.2 deg FDec001
Temperature, water deg. fahrenheitdaily maximum≤ 82.6 deg FMar001
Temperature, water deg. fahrenheitdaily maximum≤ 73.6 deg FFeb001
Temperature, water deg. fahrenheitdaily maximum≤ 77.5 deg FJan001
Temperature, water deg. fahrenheitdaily maximum≤ 85.3 deg FApr, May, Oct, Nov001
Temperature, water deg. fahrenheitdaily maximum≤ 93 deg FJun–Sep001
Temperature, water deg. fahrenheitdaily maximum≤ 75.4 deg FDec001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year001
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001
Zinc, total recoverablemonthly average≤ .26 mg/Lall year001
Zinc, total recoverabledaily maximum≤ .52 mg/Lall year001
Chromium, total recoverablemonthly average≤ .16 mg/Lall year001
Chromium, total recoverabledaily maximum≤ .16 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
Chlorine, total residualmonthly average< .06 mg/Lall year001
Chlorine, total residualdaily maximum< .06 mg/Lall year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Mercury, total recoverablemonthly average≤ 12 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximum≤ 20 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
pHdaily minimum≥ 6 SUall year101
pHdaily maximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 12 mg/Lall year101
Solids, total suspendeddaily maximum≤ 41 mg/Lall year101
Oil and grease, hexane extr methodmonthly average≤ 6 mg/Lall year101
Oil and grease, hexane extr methoddaily maximum≤ 8 mg/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
pHdaily minimum≥ 6 SUall year102
pHdaily maximum≤ 9 SUall year102
Solids, total suspendedmonthly average≤ 30 mg/Lall year102
Solids, total suspendeddaily maximum≤ 100 mg/Lall year102
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year102
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year102
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102

How strict are these limits?

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

Same industry: the 30 Electric Services permits in Indiana.

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On EPA ECHO: Facility report · DMR history

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