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Duquesne Light Co

Electric Services, Elrama, Pennsylvania. NPDES permit PA0098124, in force until Dec 31, 2029. Last 12 months: over a limit 7 times (last January 2026), 74 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (22 values), outfall 002 form A monthly (12 values), outfall 003 form A monthly (6 values), outfall 004 form A monthly (6 values), outfall 005 form A monthly (6 values), outfall 001 form Y yearly, and 6 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
23 values over a limit, 0 required values missing, 0 of 53 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025001Boron, total [as B], monthly average16.2 mg/L≤ 15 mg/L8%
December 2025001Boron, total [as B], daily maximum13.3 mg/L≤ 2.5 mg/L432%
December 2025001Boron, total [as B], monthly average10.31 mg/L≤ 1.6 mg/L544%
December 2025003Solids, total suspended, daily maximum85 mg/L≤ 60 mg/L42%
December 2025003Solids, total suspended, monthly average< 45 mg/L≤ 30 mg/L50%
January 2026001Boron, total [as B], daily maximum6.15 mg/L≤ 2.5 mg/L146%
January 2026001Boron, total [as B], monthly average6.02 mg/L≤ 1.6 mg/L276%

Limits in force (84)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 60 mg/Lall year001
Arsenic, total [as As]monthly average≤ 10 ug/Lall year001
Arsenic, total [as As]daily maximum≤ 15.6 ug/Lall year001
Boron, total [as B]monthly average≤ 1.6 mg/Lall year001
Boron, total [as B]daily maximum≤ 2.5 mg/Lall year001
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year001
Chromium, hexavalent [as Cr]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
Iron, dissolved [as Fe]monthly averagereport only (mg/L)all year001
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year001
Manganese, total [as Mn]monthly averagereport only (mg/L)all year001
Manganese, total [as Mn]daily maximumreport only (mg/L)all year001
Aluminum, total [as Al]monthly averagereport only (mg/L)all year001
Aluminum, total [as Al]daily maximumreport only (mg/L)all year001
Selenium, total [as Se]monthly average≤ 4.99 ug/Lall year001
Selenium, total [as Se]daily maximum≤ 7.79 ug/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
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year001
Perfluorooctanesulfonatedaily 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
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 60 mg/Lall year002
Boron, total [as B]monthly average≤ 1.74 mg/Lall year002
Boron, total [as B]daily maximum≤ 2.71 mg/Lall year002
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year002
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year002
Selenium, total [as Se]monthly average≤ 5.41 ug/Lall year002
Selenium, total [as Se]daily maximum≤ 8.44 ug/Lall 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
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year002
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year002
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year002
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year002
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Solids, total suspendeddaily maximum≤ 60 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
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year003
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year003
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year003
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year003
pHinstantaneous minimum≥ 6 SUall year004
pHinstantaneous maximum≤ 9 SUall year004
Solids, total suspendedmonthly average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 60 mg/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year004
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year004
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year004
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year004
pHinstantaneous minimum≥ 6 SUall year005
pHinstantaneous maximum≤ 9 SUall year005
Solids, total suspendedmonthly average≤ 30 mg/Lall year005
Solids, total suspendeddaily maximum≤ 60 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
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year005
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year005
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year005
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year005
pHdaily maximumreport only (SU)all year006
Solids, total suspendeddaily maximumreport only (mg/L)all year006
Oil & Greasedaily maximumreport only (mg/L)all year006
Nitrogen, total [as N]daily maximumreport only (mg/L)all year006
Phosphorus, total [as P]daily maximumreport only (mg/L)all year006
Iron, total [as Fe]daily maximumreport only (mg/L)all year006
pHdaily maximumreport only (SU)all year007
Solids, total suspendeddaily maximumreport only (mg/L)all year007
Oil & Greasedaily maximumreport only (mg/L)all year007
Nitrogen, total [as N]daily maximumreport only (mg/L)all year007
Phosphorus, total [as P]daily maximumreport only (mg/L)all year007
Iron, total [as Fe]daily maximumreport only (mg/L)all year007

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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Your permit document is the final word. As JSON: /api/v1/permits/PA0098124 · MCP: https://passage-data.com/mcp