POTOMAC RIVER W.R.F.

NPDES permit MD0051586 · Minor NON-POTW · effective, expires 2030-11-30 · 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

115values over a limit
31required values missing, on 3 form(s)
4of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Aluminum, total recoverable (44), Solids, total suspended (44), Iron, total [as Fe] (15).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (82)

OutfallParameterStatisticLimitMonths
001TurbidityMX MO AV <= 50 NTU all year
001TurbidityDAILY MX <= 150 NTU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 60 mg/L all year
001Solids, total suspendedMX MO AV <= 2152 lb/d all year
001Solids, total suspendedDAILY MX <= 4304 lb/d all year
001Solids, total suspendedCUM TOTL report only all year
001Solids, total suspendedMO TOTAL report only all year
001Solids, total suspendedANNL MAX <= 0 lb/yr all year
001Solids, total suspendedMO TOTAL report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]CUM TOTL report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]ANNL MAX <= 0 lb/yr all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]CUM TOTL report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]ANNL MAX <= 0 lb/yr all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Iron, total [as Fe]MX MO AV <= 4 mg/L all year
001Iron, total [as Fe]DAILY MX <= 8 mg/L all year
001Iron, total [as Fe]MX MO AV <= 287 lb/d all year
001Iron, total [as Fe]DAILY MX <= 574 lb/d all year
001Manganese, total [as Mn]MO AVG report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Manganese, total [as Mn]MO AVG report only all year
001Aluminum, total recoverableMX MO AV <= 4 mg/L all year
001Aluminum, total recoverableDAILY MX <= 8 mg/L all year
001Aluminum, total recoverableMX MO AV <= 287 lb/d all year
001Aluminum, total recoverableDAILY MX <= 574 lb/d 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
001Chlorine, total residualMO AVG report only all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
001Nitrogen, Kjeldahl TotalMO AVG report only all year
001Nitrogen, Kjeldahl TotalDAILY MX report only all year
001Flow, dischargeMAXIMUM report only all year
001Flow, totalDAILY MX report only all year
001pH range excursions, > 60 minutesMAXIMUM report only all year
201TurbidityMO AVG report only all year
201TurbidityDAILY MX report only all year
201Coagulants addedMO AVG report only all year
201Coagulants addedCUM TOTL report only all year
201Coagulants addedMY report only all year
201pHMINIMUM report only all year
201pHMAXIMUM report only all year
201Solids, total suspendedMO TOTAL report only all year
201Solids, total suspendedANNL TOT report only all year
201Solids, total suspendedMO AVG report only all year
201Solids, total suspendedDAILY MX report only all year
201Solids, total suspendedMO AVG report only all year
201Solids, total suspendedDAILY MX report only all year
201Nitrogen, total [as N]MO TOTAL report only all year
201Nitrogen, total [as N]ANNL TOT report only all year
201Nitrogen, total [as N]MO AVG report only all year
201Nitrogen, total [as N]DAILY MX report only all year
201Nitrogen, total [as N]MO AVG report only all year
201Nitrogen, total [as N]DAILY MX report only all year
201Nitrite + Nitrate total [as N]MO AVG report only all year
201Nitrite + Nitrate total [as N]DAILY MX report only all year
201Phosphorus, total [as P]MO TOTAL report only all year
201Phosphorus, total [as P]ANNL TOT report only all year
201Phosphorus, total [as P]MO AVG report only all year
201Phosphorus, total [as P]DAILY MX report only all year
201Phosphorus, total [as P]MO AVG report only all year
201Phosphorus, total [as P]DAILY MX report only all year
201Flow, in conduit or thru treatment plantMO AVG report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
201Nitrogen, Kjeldahl TotalMO AVG report only all year
201Nitrogen, Kjeldahl TotalDAILY MX report only all year
201Flow, totalMO TOTAL 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