OAK HILL, CITY OF

NPDES permit WV0020281 · Major POTW · effective, expires 2027-05-02 · 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

25values over a limit
0required values missing, on 0 form(s)
2of 60 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total recoverable (12), Solids, suspended percent removal (4), Zinc, total recoverable (3).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (174)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 325 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 650 lb/d all year
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
001Solids, total suspendedMO AVG <= 325 lb/d all year
001Solids, total suspendedDAILY MX <= 650 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 6.8 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 13.7 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 74 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 149 lb/d all year
001Cyanide, weak acid, dissociableMO AVG report only all year
001Cyanide, weak acid, dissociableDAILY MX report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Arsenic, total [as As]MO AVG report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Chromium, hexavalent [as Cr]MO AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableDAILY MX report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG <= .056 mg/L all year
001Zinc, total recoverableDAILY MX <= .105 mg/L all year
001Cadmium, total recoverableMO AVG report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverableMO AVG <= .002 mg/L all year
001Lead, total recoverableDAILY MX <= .005 mg/L all year
001Copper, total recoverableMO AVG <= .006 mg/L all year
001Copper, total recoverableDAILY MX <= .012 mg/L all year
001Flow, in conduit or thru treatment plantMINIMUM 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 <= 0 mg/L all year
001Chlorine, total residualDAILY MX <= 0 mg/L all year
001Toxicity [chronic], Ceriodaphnia dubiaMO AVG report only all year
001Toxicity [chronic], Ceriodaphnia dubiaDAILY MX report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AVG report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001Coliform, fecal generalDAILY MX <= 400 #/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
002Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 150 lb/d all year
002BOD, 5-day, 20 deg. CDAILY MX <= 300 lb/d 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
002Solids, total suspendedMO AVG <= 150 lb/d all year
002Solids, total suspendedDAILY MX <= 300 lb/d all year
002Nitrogen, ammonia total [as N]MO AVG <= 6.8 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX <= 13.7 mg/L all year
002Nitrogen, ammonia total [as N]MO AVG <= 34 lb/d all year
002Nitrogen, ammonia total [as N]DAILY MX <= 69 lb/d all year
002Hardness, total [as CaCO3]MO AVG report only all year
002Hardness, total [as CaCO3]DAILY MX report only all year
002Zinc, total recoverableMO AVG <= .065 mg/L all year
002Zinc, total recoverableDAILY MX <= .102 mg/L all year
002Lead, total recoverableMO AVG report only all year
002Lead, total recoverableDAILY MX report only all year
002Copper, total recoverableMO AVG <= .006 mg/L all year
002Copper, total recoverableDAILY MX <= .012 mg/L all year
002Flow, in conduit or thru treatment plantMINIMUM 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 <= 0 mg/L all year
002Chlorine, total residualDAILY MX <= 0 mg/L all year
002Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
002Coliform, fecal generalDAILY MX <= 400 #/100mL all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
006BOD, 5-day, 20 deg. CMO AVG report only all year
006BOD, 5-day, 20 deg. CDAILY 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
006Oil and grease, hexane extr methodMO AVG report only all year
006Oil and grease, hexane extr methodDAILY MX report only all year
006Nitrogen, ammonia total [as N]MO AVG report only all year
006Nitrogen, ammonia total [as N]DAILY 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
006Coliform, fecal generalMO GEOMN report only all year
006Coliform, fecal generalDAILY MX <= 400 #/100mL all year
006Chemical Oxygen Demand [COD]MO AVG report only all year
006Chemical Oxygen Demand [COD]DAILY MX report only all year
IU01Flow rateMO AVG report only all year
IU01Flow rateDAILY MX <= 1000 gal/d all year
IU01pHINST MIN >= 6 SU all year
IU01pHINST MAX <= 9 SU all year
IU01Solids, total suspendedMO AVG report only all year
IU01Solids, total suspendedDAILY MX <= 250 mg/L all year
IU01Oil and grease, hexane extr methodMO AVG report only all year
IU01Oil and grease, hexane extr methodDAILY MX <= 30 mg/L all year
IU01Copper, total [as Cu]MO AVG report only all year
IU01Copper, total [as Cu]DAILY MX report only all year
IU01Copper, total [as Cu]MO AVG report only all year
IU01Copper, total [as Cu]DAILY MX report only all year
IU01Lead, total [as Pb]MO AVG report only all year
IU01Lead, total [as Pb]DAILY MX report only all year
IU01Lead, total [as Pb]MO AVG report only all year
IU01Lead, total [as Pb]DAILY MX report only all year
IU01Zinc, total [as Zn]MO AVG report only all year
IU01Zinc, total [as Zn]DAILY MX report only all year
IU01Zinc, total [as Zn]MO AVG report only all year
IU01Zinc, total [as Zn]DAILY MX report only all year
IU04Flow rateMO AVG report only all year
IU04Flow rateDAILY MX <= 32000 gal/d all year
IU04BOD, 5-day, 20 deg. CMO AVG report only all year
IU04BOD, 5-day, 20 deg. CDAILY MX report only all year
IU04BOD, 5-day, 20 deg. CMO AVG report only all year
IU04BOD, 5-day, 20 deg. CDAILY MX <= 12.5 lb/d all year
IU04pHINST MIN >= 5 SU all year
IU04pHINST MAX <= 10 SU all year
IU04Solids, total suspendedMO AVG report only all year
IU04Solids, total suspendedDAILY MX report only all year
IU04Solids, total suspendedMO AVG report only all year
IU04Solids, total suspendedDAILY MX <= 12.5 lb/d all year
IU04Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
IU04Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
IU04Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
IU04Nitrogen, Kjeldahl, total [as N]DAILY MX <= 5 lb/d all year
IU04Cyanide, total [as CN]MO AVG report only all year
IU04Cyanide, total [as CN]DAILY MX report only all year
IU04Cyanide, total [as CN]MO AVG report only all year
IU04Cyanide, total [as CN]DAILY MX <= .01 lb/d all year
IU04Arsenic, total [as As]MO AVG report only all year
IU04Arsenic, total [as As]DAILY MX report only all year
IU04Arsenic, total [as As]MO AVG report only all year
IU04Arsenic, total [as As]DAILY MX <= .001 lb/d all year
IU04Cadmium, total [as Cd]MO AVG report only all year
IU04Cadmium, total [as Cd]DAILY MX report only all year
IU04Cadmium, total [as Cd]MO AVG report only all year
IU04Cadmium, total [as Cd]DAILY MX <= .0001 lb/d all year
IU04Chromium, hexavalent [as Cr]MO AVG report only all year
IU04Chromium, hexavalent [as Cr]DAILY MX report only all year
IU04Chromium, hexavalent [as Cr]MO AVG report only all year
IU04Chromium, hexavalent [as Cr]DAILY MX <= .01 lb/d all year
IU04Copper, total [as Cu]MO AVG report only all year
IU04Copper, total [as Cu]DAILY MX report only all year
IU04Copper, total [as Cu]MO AVG report only all year
IU04Copper, total [as Cu]DAILY MX <= .05 lb/d all year
IU04Lead, total [as Pb]MO AVG report only all year
IU04Lead, total [as Pb]DAILY MX report only all year
IU04Lead, total [as Pb]MO AVG report only all year
IU04Lead, total [as Pb]DAILY MX <= .01 lb/d all year
IU04Nickel, total [as Ni]MO AVG report only all year
IU04Nickel, total [as Ni]DAILY MX report only all year
IU04Nickel, total [as Ni]MO AVG report only all year
IU04Nickel, total [as Ni]DAILY MX <= .05 lb/d all year
IU04Silver, total [as Ag]MO AVG report only all year
IU04Silver, total [as Ag]DAILY MX report only all year
IU04Silver, total [as Ag]MO AVG report only all year
IU04Silver, total [as Ag]DAILY MX <= .0005 lb/d all year
IU04Zinc, total [as Zn]MO AVG report only all year
IU04Zinc, total [as Zn]DAILY MX report only all year
IU04Zinc, total [as Zn]MO AVG report only all year
IU04Zinc, total [as Zn]DAILY MX <= .05 lb/d all year
IU04Mercury, total [as Hg]MO AVG report only all year
IU04Mercury, total [as Hg]DAILY MX report only all year
IU04Mercury, total [as Hg]MO AVG report only all year
IU04Mercury, total [as Hg]DAILY MX <= .00035 lb/d all year

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