DUQUESNE LIGHT CO

NPDES permit PA0215562 · Minor NON-POTW · effective, expires 2026-10-07 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
114required values missing, on 6 form(s)
0of 20 forms filed late

Last period with anything received: 2026-03-31.

Reporting

Reports are due about 89 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (76)

OutfallParameterStatisticLimitMonths
002pHINST MIN >= 6 SU all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002pHINST MAX <= 9 SU all year
002Alkalinity, total [as CaCO3]INST MAX report only all year
002Alkalinity, total [as CaCO3]INST MAX report only all year
002Acidity, total [as CaCO3]INST MAX report only all year
002Acidity, total [as CaCO3]INST MAX report only all year
002Solids, total suspendedMO AVG <= 35 mg/L all year
002Solids, total suspendedMO AVG <= 35 mg/L all year
002Solids, total suspendedDAILY MX <= 70 mg/L all year
002Solids, total suspendedDAILY MX <= 70 mg/L all year
002Solids, total suspendedINST MAX <= 90 mg/L all year
002Solids, total suspendedINST MAX <= 90 mg/L all year
002Sulfate, total [as SO4]INST MAX report only all year
002Sulfate, total [as SO4]INST MAX report only all year
002Iron, total [as Fe]MO AVG <= 1.6 mg/L all year
002Iron, total [as Fe]MO AVG <= 1.6 mg/L all year
002Iron, total [as Fe]DAILY MX <= 2.5 mg/L all year
002Iron, total [as Fe]DAILY MX <= 2.5 mg/L all year
002Iron, total [as Fe]INST MAX <= 3.9 mg/L all year
002Iron, total [as Fe]INST MAX <= 3.9 mg/L all year
002Manganese, total [as Mn]MO AVG <= 2 mg/L all year
002Manganese, total [as Mn]MO AVG <= 2 mg/L all year
002Manganese, total [as Mn]DAILY MX <= 4 mg/L all year
002Manganese, total [as Mn]DAILY MX <= 4 mg/L all year
002Manganese, total [as Mn]INST MAX <= 5 mg/L all year
002Manganese, total [as Mn]INST MAX <= 5 mg/L all year
002Aluminum, total [as Al]INST MAX report only all year
002Aluminum, total [as Al]INST MAX report only all year
002Flow, in conduit or thru treatment plantINST MAX report only all year
002Flow, in conduit or thru treatment plantINST MAX report only all year
002Alkalinity - Acidity [as CaCO3]INST MIN >= 0 mg/L all year
002Alkalinity - Acidity [as CaCO3]INST MIN >= 0 mg/L all year
002Solids, total dissolvedINST MAX report only all year
002Solids, total dissolvedINST MAX report only all year
002Osmotic pressure, total, unf whl wtrINST MAX report only all year
002Osmotic pressure, total, unf whl wtrINST MAX report only all year
007pHINST MIN >= 6 SU all year
007pHINST MIN >= 6 SU all year
007pHINST MAX <= 9 SU all year
007pHINST MAX <= 9 SU all year
007Alkalinity, total [as CaCO3]INST MAX report only all year
007Alkalinity, total [as CaCO3]INST MAX report only all year
007Acidity, total [as CaCO3]INST MAX report only all year
007Acidity, total [as CaCO3]INST MAX report only all year
007Solids, total suspendedMO AVG <= 35 mg/L all year
007Solids, total suspendedMO AVG <= 35 mg/L all year
007Solids, total suspendedDAILY MX <= 70 mg/L all year
007Solids, total suspendedDAILY MX <= 70 mg/L all year
007Solids, total suspendedINST MAX <= 90 mg/L all year
007Solids, total suspendedINST MAX <= 90 mg/L all year
007Sulfate, total [as SO4]INST MAX report only all year
007Sulfate, total [as SO4]INST MAX report only all year
007Iron, total [as Fe]MO AVG <= 1.6 mg/L all year
007Iron, total [as Fe]MO AVG <= 1.6 mg/L all year
007Iron, total [as Fe]DAILY MX <= 2.5 mg/L all year
007Iron, total [as Fe]DAILY MX <= 2.5 mg/L all year
007Iron, total [as Fe]INST MAX <= 3.9 mg/L all year
007Iron, total [as Fe]INST MAX <= 3.9 mg/L all year
007Manganese, total [as Mn]MO AVG <= 2 mg/L all year
007Manganese, total [as Mn]MO AVG <= 2 mg/L all year
007Manganese, total [as Mn]DAILY MX <= 4 mg/L all year
007Manganese, total [as Mn]DAILY MX <= 4 mg/L all year
007Manganese, total [as Mn]INST MAX <= 5 mg/L all year
007Manganese, total [as Mn]INST MAX <= 5 mg/L all year
007Aluminum, total [as Al]INST MAX report only all year
007Aluminum, total [as Al]INST MAX report only all year
007Flow, in conduit or thru treatment plantINST MAX report only all year
007Flow, in conduit or thru treatment plantINST MAX report only all year
007Alkalinity - Acidity [as CaCO3]INST MIN >= 0 mg/L all year
007Alkalinity - Acidity [as CaCO3]INST MIN >= 0 mg/L all year
007Solids, total dissolvedINST MAX report only all year
007Solids, total dissolvedINST MAX report only all year
007Osmotic pressure, total, unf whl wtrINST MAX report only all year
007Osmotic pressure, total, unf whl wtrINST MAX 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