DUQUESNE LIGHT CO

NPDES permit PA0098124 · Minor NON-POTW · effective, expires 2029-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

8values over a limit
22required values missing, on 4 form(s)
0of 56 forms filed late

Last period with anything received: 2026-06-30. Most often over: Boron, total [as B] (6), Solids, total suspended (2).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among PA permits in EPA's filings — check your permit).

Limits in force (84)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 60 mg/L all year
001Arsenic, total [as As]MO AVG <= 10 ug/L all year
001Arsenic, total [as As]DAILY MX <= 15.6 ug/L all year
001Boron, total [as B]MO AVG <= 1.6 mg/L all year
001Boron, total [as B]DAILY MX <= 2.5 mg/L all year
001Chromium, hexavalent [as Cr]MO AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Iron, total [as Fe]MO AVG report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, dissolved [as Fe]MO AVG report only all year
001Iron, dissolved [as Fe]DAILY MX report only all year
001Manganese, total [as Mn]MO AVG report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Aluminum, total [as Al]MO AVG report only all year
001Aluminum, total [as Al]DAILY MX report only all year
001Selenium, total [as Se]MO AVG <= 4.99 ug/L all year
001Selenium, total [as Se]DAILY MX <= 7.79 ug/L all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Perfluorooctanoic acid (PFOA)DAILY MX report only all year
001PerfluorooctanesulfonateDAILY MX report only all year
001Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 60 mg/L all year
002Boron, total [as B]MO AVG <= 1.74 mg/L all year
002Boron, total [as B]DAILY MX <= 2.71 mg/L all year
002Chromium, hexavalent [as Cr]MO AVG report only all year
002Chromium, hexavalent [as Cr]DAILY MX report only all year
002Selenium, total [as Se]MO AVG <= 5.41 ug/L all year
002Selenium, total [as Se]DAILY MX <= 8.44 ug/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Perfluorooctanoic acid (PFOA)DAILY MX report only all year
002PerfluorooctanesulfonateDAILY MX report only all year
002Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
002Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
003pHINST MIN >= 6 SU all year
003pHINST MAX <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 60 mg/L all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Perfluorooctanoic acid (PFOA)DAILY MX report only all year
003PerfluorooctanesulfonateDAILY MX report only all year
003Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
003Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
004pHINST MIN >= 6 SU all year
004pHINST MAX <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 60 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Perfluorooctanoic acid (PFOA)DAILY MX report only all year
004PerfluorooctanesulfonateDAILY MX report only all year
004Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
004Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
005pHINST MIN >= 6 SU all year
005pHINST MAX <= 9 SU all year
005Solids, total suspendedMO AVG <= 30 mg/L all year
005Solids, total suspendedDAILY MX <= 60 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Perfluorooctanoic acid (PFOA)DAILY MX report only all year
005PerfluorooctanesulfonateDAILY MX report only all year
005Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
005Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
006pHDAILY MX report only all year
006Solids, total suspendedDAILY MX report only all year
006Oil & GreaseDAILY MX report only all year
006Nitrogen, total [as N]DAILY MX report only all year
006Phosphorus, total [as P]DAILY MX report only all year
006Iron, total [as Fe]DAILY MX report only all year
007pHDAILY MX report only all year
007Solids, total suspendedDAILY MX report only all year
007Oil & GreaseDAILY MX report only all year
007Nitrogen, total [as N]DAILY MX report only all year
007Phosphorus, total [as P]DAILY MX report only all year
007Iron, total [as Fe]DAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states