Pepco Holdings

NPDES permit DC0000390 · Minor NON-POTW · effective, expires 2030-07-31 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 6 forms filed late

Last period with anything received: 2026-06-30. Most often over: Benzo[b]fluoranthene (1).

Reporting

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

Limits in force (60)

OutfallParameterStatisticLimitMonths
101pHMAXIMUM <= 8.5 SU all year
101pHMAXIMUM <= 8.5 SU all year
101pHMINIMUM >= 6 SU all year
101pHMINIMUM >= 6 SU all year
101Solids, total suspendedDAILY MX <= 100 mg/L all year
101Solids, total suspendedDAILY MX <= 100 mg/L all year
101Oil & GreaseDAILY MX <= 10 mg/L all year
101Oil & GreaseDAILY MX <= 10 mg/L all year
101Nitrogen, total [as N]DAILY MX report only all year
101Nitrogen, total [as N]DAILY MX report only all year
101Phosphorus, total [as P]DAILY MX report only all year
101Phosphorus, total [as P]DAILY MX report only all year
101Arsenic, total [as As]DAILY MX <= 340 ug/L all year
101Arsenic, total [as As]DAILY MX <= 340 ug/L all year
101Cadmium, total [as Cd]DAILY MX <= 22 ug/L (alert) all year
101Cadmium, total [as Cd]DAILY MX <= 22 ug/L (alert) all year
101Copper, total [as Cu]DAILY MX <= 85 ug/L all year
101Copper, total [as Cu]DAILY MX <= 85 ug/L all year
101Iron, total [as Fe]DAILY MX <= 12400 ug/L all year
101Iron, total [as Fe]DAILY MX <= 12400 ug/L all year
101Lead, total [as Pb]DAILY MX <= 801 ug/L (alert) all year
101Lead, total [as Pb]DAILY MX <= 801 ug/L (alert) all year
101Nickel, total [as Ni]DAILY MX <= 5806 ug/L (alert) all year
101Nickel, total [as Ni]DAILY MX <= 5806 ug/L (alert) all year
101Zinc, total [as Zn]DAILY MX <= 1274 ug/L (alert) all year
101Zinc, total [as Zn]DAILY MX <= 1274 ug/L (alert) all year
101Benzo[b]fluorantheneDAILY MX <= .0013 ug/L all year
101Benzo[b]fluorantheneDAILY MX <= .0013 ug/L all year
101Benzo[k]fluorantheneDAILY MX <= .013 ug/L all year
101Benzo[k]fluorantheneDAILY MX <= .013 ug/L all year
101Benzo[a]pyreneDAILY MX <= .00013 ug/L all year
101Benzo[a]pyreneDAILY MX <= .00013 ug/L all year
101ChryseneDAILY MX <= .13 ug/L all year
101ChryseneDAILY MX <= .13 ug/L all year
101FluorantheneDAILY MX <= 20 ug/L all year
101FluorantheneDAILY MX <= 20 ug/L all year
101Indeno[1,2,3-cd]pyreneDAILY MX <= .0013 ug/L all year
101Indeno[1,2,3-cd]pyreneDAILY MX <= .0013 ug/L all year
101PyreneDAILY MX <= 30 ug/L all year
101PyreneDAILY MX <= 30 ug/L all year
101Benzo[a]anthraceneDAILY MX <= .0013 ug/L all year
101Benzo[a]anthraceneDAILY MX <= .0013 ug/L all year
101Dibenz[a,h]anthraceneDAILY MX <= .00013 ug/L all year
101Dibenz[a,h]anthraceneDAILY MX <= .00013 ug/L all year
101DDTDAILY MX <= 1.1 ug/L all year
101DDTDAILY MX <= 1.1 ug/L all year
101DieldrinDAILY MX <= .24 ug/L all year
101DieldrinDAILY MX <= .24 ug/L all year
101Heptachlor epoxideDAILY MX <= .52 ug/L all year
101Heptachlor epoxideDAILY MX <= .52 ug/L all year
101PCB-1242DAILY MX <= 1 ug/L all year
101PCB-1242DAILY MX <= 1 ug/L all year
101PCB-1254DAILY MX <= 1 ug/L all year
101PCB-1254DAILY MX <= 1 ug/L all year
101PCB-1260DAILY MX <= 1 ug/L all year
101PCB-1260DAILY MX <= 1 ug/L all year
101ChlordaneDAILY MX <= 2.4 ug/L all year
101ChlordaneDAILY MX <= 2.4 ug/L all year
101FlowTOTAL report only all year
101FlowTOTAL 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