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Duquesne Light Co

Bituminous Coal And Lignite - Surface, Greensboro, Pennsylvania. NPDES permit PA0215562 expired Oct 7, 2026; its limits still apply. Last 12 months: no values over a limit, 114 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 89 days after each period: outfall 002 form A quarterly (38 values), outfall 007 form A quarterly (38 values)
Last report on file
March 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 6 of 16 reports late

Limits in force (76)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Solids, total suspendedmonthly average≤ 35 mg/Lall year002
Solids, total suspendedmonthly average≤ 35 mg/Lall year002
Solids, total suspendeddaily maximum≤ 70 mg/Lall year002
Solids, total suspendeddaily maximum≤ 70 mg/Lall year002
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year002
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year002
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year002
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year002
Iron, total [as Fe]monthly average≤ 1.6 mg/Lall year002
Iron, total [as Fe]monthly average≤ 1.6 mg/Lall year002
Iron, total [as Fe]daily maximum≤ 2.5 mg/Lall year002
Iron, total [as Fe]daily maximum≤ 2.5 mg/Lall year002
Iron, total [as Fe]instantaneous maximum≤ 3.9 mg/Lall year002
Iron, total [as Fe]instantaneous maximum≤ 3.9 mg/Lall year002
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year002
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year002
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year002
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year002
Manganese, total [as Mn]instantaneous maximum≤ 5 mg/Lall year002
Manganese, total [as Mn]instantaneous maximum≤ 5 mg/Lall year002
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year002
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year002
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year002
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year002
Solids, total dissolvedinstantaneous maximumreport only (mg/L)all year002
Solids, total dissolvedinstantaneous maximumreport only (mg/L)all year002
Osmotic pressure, total, unf whl wtrinstantaneous maximumreport only (mOsm/kg)all year002
Osmotic pressure, total, unf whl wtrinstantaneous maximumreport only (mOsm/kg)all year002
pHinstantaneous minimum≥ 6 SUall year007
pHinstantaneous minimum≥ 6 SUall year007
pHinstantaneous maximum≤ 9 SUall year007
pHinstantaneous maximum≤ 9 SUall year007
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year007
Solids, total suspendedmonthly average≤ 35 mg/Lall year007
Solids, total suspendedmonthly average≤ 35 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year007
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year007
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year007
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year007
Iron, total [as Fe]monthly average≤ 1.6 mg/Lall year007
Iron, total [as Fe]monthly average≤ 1.6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 2.5 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 2.5 mg/Lall year007
Iron, total [as Fe]instantaneous maximum≤ 3.9 mg/Lall year007
Iron, total [as Fe]instantaneous maximum≤ 3.9 mg/Lall year007
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year007
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]instantaneous maximum≤ 5 mg/Lall year007
Manganese, total [as Mn]instantaneous maximum≤ 5 mg/Lall year007
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year007
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year007
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year007
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year007
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year007
Solids, total dissolvedinstantaneous maximumreport only (mg/L)all year007
Solids, total dissolvedinstantaneous maximumreport only (mg/L)all year007
Osmotic pressure, total, unf whl wtrinstantaneous maximumreport only (mOsm/kg)all year007
Osmotic pressure, total, unf whl wtrinstantaneous maximumreport only (mOsm/kg)all year007

How strict are these limits?

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

Same industry: the 351 Coal Mining 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/PA0215562 · MCP: https://passage-data.com/mcp