MONONGAHELA POWER COMPANY

NPDES permit WV0005339 · Major NON-POTW · effective, expires 2029-04-24 · 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

1values over a limit
8required values missing, on 4 form(s)
0of 82 forms filed late

Last period with anything received: 2026-07-31. Most often over: Iron, total recoverable (1).

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among WV permits in EPA's filings — check your permit).

Limits in force (299)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitINST MAX <= 110 deg F all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temp. diff. between samp. & upstrm deg. FMO AVG report only all year
001Temp. diff. between samp. & upstrm deg. FINST MAX <= 55 deg F all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 27 mg/L all year
001Solids, total suspendedDAILY MX <= 77 mg/L all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil and grease, hexane extr methodMO AVG <= 8.8 mg/L all year
001Oil and grease, hexane extr methodMO AVG <= 8.8 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 12 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 12 mg/L all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX report only all year
001Oil and grease, hexane extr methodDAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Iron, total recoverableMO AVG <= 1.26 mg/L all year
001Iron, total recoverableDAILY MX <= 2.1 mg/L all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Selenium, total recoverableDAILY MX report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableDAILY MX report only all year
001Nickel, total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Zinc, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableDAILY MX report only all year
001Aluminum, total recoverableDAILY MX report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Copper, total recoverableDAILY MX report only 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 <= 18 ug/L all year
001Chlorine, total residualDAILY MX <= 36 ug/L all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001SulfateMO AVG report only all year
001SulfateMO AVG report only all year
001SulfateDAILY MX report only all year
001SulfateDAILY MX report only all year
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitINST MAX <= 110 deg F all year
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Temp. diff. between samp. & upstrm deg. FMO AVG report only all year
002Temp. diff. between samp. & upstrm deg. FINST MAX <= 55 deg F all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedMO AVG <= 27 mg/L all year
002Solids, total suspendedDAILY MX <= 77 mg/L all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil and grease, hexane extr methodMO AVG <= 8.8 mg/L all year
002Oil and grease, hexane extr methodMO AVG <= 8.8 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 12 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 12 mg/L all year
002Oil and grease, hexane extr methodMO AVG report only all year
002Oil and grease, hexane extr methodMO AVG report only all year
002Oil and grease, hexane extr methodDAILY MX report only all year
002Oil and grease, hexane extr methodDAILY MX report only all year
002Arsenic, total recoverableMO AVG report only all year
002Arsenic, total recoverableMO AVG report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Iron, total recoverableMO AVG <= 1.26 mg/L all year
002Iron, total recoverableDAILY MX <= 2.1 mg/L all year
002Selenium, total recoverableMO AVG report only all year
002Selenium, total recoverableMO AVG report only all year
002Selenium, total recoverableDAILY MX report only all year
002Selenium, total recoverableDAILY MX report only all year
002Nickel, total recoverableMO AVG report only all year
002Nickel, total recoverableMO AVG report only all year
002Nickel, total recoverableDAILY MX report only all year
002Nickel, total recoverableDAILY MX report only all year
002Zinc, total recoverableMO AVG report only all year
002Zinc, total recoverableMO AVG report only all year
002Zinc, total recoverableDAILY MX report only all year
002Zinc, total recoverableDAILY MX report only all year
002Aluminum, total recoverableMO AVG report only all year
002Aluminum, total recoverableMO AVG report only all year
002Aluminum, total recoverableDAILY MX report only all year
002Aluminum, total recoverableDAILY MX report only all year
002Lead, total recoverableMO AVG report only all year
002Lead, total recoverableMO AVG report only all year
002Lead, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only all year
002Copper, total recoverableMO AVG report only all year
002Copper, total recoverableMO AVG report only all year
002Copper, total recoverableDAILY MX report only all year
002Copper, total recoverableDAILY MX report only 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
002Chlorine, total residualMO AVG <= 18 ug/L all year
002Chlorine, total residualDAILY MX <= 36 ug/L all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002SulfateMO AVG report only all year
002SulfateMO AVG report only all year
002SulfateDAILY MX report only all year
002SulfateDAILY MX report only all year
006pHINST MIN report only all year
006pHINST MAX report only all year
006Solids, total suspendedMO AVG report only all year
006Solids, total suspendedDAILY MX report only all year
006Arsenic, total recoverableMO AVG report only all year
006Arsenic, total recoverableDAILY MX report only all year
006Iron, total recoverableMO AVG report only all year
006Iron, total recoverableDAILY MX report only all year
006Selenium, total recoverableMO AVG report only all year
006Selenium, total recoverableDAILY MX report only all year
006Zinc, total recoverableMO AVG report only all year
006Zinc, total recoverableDAILY MX report only all year
006Aluminum, total recoverableMO AVG report only all year
006Aluminum, total recoverableDAILY MX report only all year
006Copper, total recoverableMO AVG report only all year
006Copper, total recoverableDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualMO AVG report only all year
006Chlorine, total residualDAILY MX report only all year
006Mercury, total [as Hg]MO AVG report only all year
006Mercury, total [as Hg]DAILY MX report only all year
006SulfateMO AVG report only all year
006SulfateDAILY MX report only all year
007pHINST MIN report only all year
007pHINST MAX report only all year
007Solids, total suspendedMO AVG report only all year
007Solids, total suspendedDAILY MX report only all year
007Arsenic, total recoverableMO AVG report only all year
007Arsenic, total recoverableDAILY MX report only all year
007Iron, total recoverableMO AVG report only all year
007Iron, total recoverableMO AVG report only all year
007Iron, total recoverableDAILY MX <= 1.5 mg/L all year
007Iron, total recoverableDAILY MX <= 1.5 mg/L all year
007Selenium, total recoverableMO AVG report only all year
007Selenium, total recoverableDAILY MX report only all year
007Zinc, total recoverableMO AVG report only all year
007Zinc, total recoverableMO AVG report only all year
007Zinc, total recoverableDAILY MX <= .69 mg/L all year
007Zinc, total recoverableDAILY MX <= .69 mg/L all year
007Aluminum, total recoverableMO AVG report only all year
007Aluminum, total recoverableDAILY MX report only all year
007Copper, total recoverableMO AVG report only all year
007Copper, total recoverableDAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residualMO AVG report only all year
007Chlorine, total residualDAILY MX report only all year
007Mercury, total [as Hg]MO AVG report only all year
007Mercury, total [as Hg]DAILY MX report only all year
010pHINST MIN report only all year
010pHINST MAX report only all year
010Solids, total suspendedMO AVG report only all year
010Solids, total suspendedDAILY MX report only all year
010Arsenic, total recoverableMO AVG report only all year
010Arsenic, total recoverableDAILY MX report only all year
010Iron, total recoverableMO AVG report only all year
010Iron, total recoverableMO AVG report only all year
010Iron, total recoverableDAILY MX <= 1.5 mg/L all year
010Iron, total recoverableDAILY MX <= 1.5 mg/L all year
010Selenium, total recoverableMO AVG report only all year
010Selenium, total recoverableDAILY MX report only all year
010Zinc, total recoverableMO AVG report only all year
010Zinc, total recoverableDAILY MX report only all year
010Aluminum, total recoverableMO AVG report only all year
010Aluminum, total recoverableDAILY MX report only all year
010Copper, total recoverableMO AVG report only all year
010Copper, total recoverableDAILY MX report only all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Chlorine, total residualMO AVG report only all year
010Chlorine, total residualDAILY MX report only all year
010Mercury, total [as Hg]MO AVG report only all year
010Mercury, total [as Hg]DAILY MX report only all year
012pHINST MIN report only all year
012pHINST MAX report only all year
012Solids, total suspendedMO AVG report only all year
012Solids, total suspendedDAILY MX report only all year
012Arsenic, total recoverableMO AVG report only all year
012Arsenic, total recoverableDAILY MX report only all year
012Iron, total recoverableMO AVG report only all year
012Iron, total recoverableDAILY MX report only all year
012Selenium, total recoverableMO AVG report only all year
012Selenium, total recoverableDAILY MX report only all year
012Zinc, total recoverableMO AVG report only all year
012Zinc, total recoverableDAILY MX report only all year
012Aluminum, total recoverableMO AVG report only all year
012Aluminum, total recoverableDAILY MX report only all year
012Copper, total recoverableMO AVG report only all year
012Copper, total recoverableDAILY MX report only all year
012Flow, in conduit or thru treatment plantMO AVG report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
012Chlorine, total residualMO AVG report only all year
012Chlorine, total residualDAILY MX report only all year
012Mercury, total [as Hg]MO AVG report only all year
012Mercury, total [as Hg]DAILY MX report only all year
013pHINST MIN report only all year
013pHINST MAX report only all year
013Solids, total suspendedMO AVG report only all year
013Solids, total suspendedDAILY MX report only all year
013Arsenic, total recoverableMO AVG report only all year
013Arsenic, total recoverableDAILY MX report only all year
013Iron, total recoverableMO AVG report only all year
013Iron, total recoverableDAILY MX report only all year
013Selenium, total recoverableMO AVG report only all year
013Selenium, total recoverableDAILY MX report only all year
013Zinc, total recoverableMO AVG report only all year
013Zinc, total recoverableDAILY MX report only all year
013Aluminum, total recoverableMO AVG report only all year
013Aluminum, total recoverableDAILY MX report only all year
013Copper, total recoverableMO AVG report only all year
013Copper, total recoverableDAILY MX report only all year
013Flow, in conduit or thru treatment plantMO AVG report only all year
013Flow, in conduit or thru treatment plantDAILY MX report only all year
013Mercury, total [as Hg]MO AVG report only all year
013Mercury, total [as Hg]DAILY MX report only all year
101BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
101BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
101BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
101BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
101BOD, 5-day, 20 deg. CMO AVG <= 9.14 lb/d all year
101BOD, 5-day, 20 deg. CMO AVG <= 9.14 lb/d all year
101BOD, 5-day, 20 deg. CDAILY MX <= 18.28 lb/d all year
101BOD, 5-day, 20 deg. CDAILY MX <= 18.28 lb/d all year
101pHINST MIN >= 6 SU all year
101pHINST MIN >= 6 SU all year
101pHINST MAX <= 9 SU all year
101pHINST MAX <= 9 SU all year
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedDAILY MX <= 60 mg/L all year
101Solids, total suspendedDAILY MX <= 60 mg/L all year
101Solids, total suspendedMO AVG <= 9.14 lb/d all year
101Solids, total suspendedMO AVG <= 9.14 lb/d all year
101Solids, total suspendedDAILY MX <= 18.28 lb/d all year
101Solids, total suspendedDAILY MX <= 18.28 lb/d all year
101Nitrogen, ammonia total [as N]MO AVG <= 15 mg/L all year
101Nitrogen, ammonia total [as N]MO AVG <= 15 mg/L all year
101Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L all year
101Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L all year
101Nitrogen, ammonia total [as N]MO AVG <= 4.5 lb/d all year
101Nitrogen, ammonia total [as N]MO AVG <= 4.5 lb/d all year
101Nitrogen, ammonia total [as N]DAILY MX <= 9 lb/d all year
101Nitrogen, ammonia total [as N]DAILY MX <= 9 lb/d all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX <= .036 MGD all year
101Flow, in conduit or thru treatment plantDAILY MX <= .036 MGD all year
101Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
101Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
101Coliform, fecal generalDAILY MX <= 400 #/100mL all year
101Coliform, fecal generalDAILY MX <= 400 #/100mL all year
102Solids, total suspendedMO AVG <= 30 mg/L all year
102Solids, total suspendedDAILY MX <= 100 mg/L all year
102Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
102Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
102Copper, total [as Cu]MO AVG <= 1 mg/L all year
102Copper, total [as Cu]DAILY MX <= 1 mg/L all year
102Iron, total [as Fe]MO AVG <= 1 mg/L all year
102Iron, total [as Fe]DAILY MX <= 1 mg/L all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
301Toxicity [chronic], Ceriodaphnia dubiaMO AVG <= 3.8 tox chronic all year
301Toxicity [chronic], Ceriodaphnia dubiaDAILY MX <= 7.7 tox chronic all year
301Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AVG <= 3.8 tox chronic all year
301Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX <= 7.7 tox chronic all year
401Toxicity [chronic], Ceriodaphnia dubiaMO AVG <= 1.6 tox chronic all year
401Toxicity [chronic], Ceriodaphnia dubiaDAILY MX <= 3.3 tox chronic all year
401Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AVG <= 1.6 tox chronic all year
401Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX <= 3.3 tox chronic all year
INTToxics, percent removalMH >= 95 % all year

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