Portsmouth Lawson Run WWTP

NPDES permit OH0027197 · Major POTW · effective, expires 2030-12-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 147 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (141)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY MAX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 738.1 kg/d all year
001Solids, total suspendedWKLY MAX <= 1107.1 kg/d all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX 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
001Phosphate, ortho, dissolved [as P]MO AVG report only all year
001Phosphate, ortho, dissolved [as P]DAILY MX report only all year
001Nickel, total recoverableMO AVG report only Mar, Jun, Aug, Dec
001Nickel, total recoverableDAILY MX report only Mar, Jun, Aug, Dec
001Silver total recoverableMO AVG report only all year
001Silver total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG report only Mar, Jun, Aug, Dec
001Zinc, total recoverableDAILY MX report only Mar, Jun, Aug, Dec
001Cadmium, total recoverableMO AVG report only Mar, Jun, Aug, Dec
001Cadmium, total recoverableDAILY MX report only Mar, Jun, Aug, Dec
001Lead, total recoverableMO AVG report only Mar, Jun, Aug, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Aug, Dec
001Chromium, total recoverableMO AVG report only Mar, Jun, Aug, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Aug, Dec
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only Mar, Jun, Aug, Dec
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only Mar, Jun, Aug, Dec
001Coliform, fecal MF, MFC broth, 44.5 CMO GEOMN <= 1000 #/100mL Jan, Feb, Mar, Apr, Nov, Dec
001Coliform, fecal MF, MFC broth, 44.5 CWK GEOMN <= 2000 #/100mL Jan, Feb, Mar, Apr, Nov, Dec
001E. coli, MTEC-MFMO GEOMN <= 126 MPN/100mL May, Jun, Jul, Aug, Sep, Oct
001E. coli, MTEC-MFWK GEOMN <= 284 MPN/100mL May, Jun, Jul, Aug, Sep, Oct
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 residualDAILY MX <= .038 mg/L all year
001Mercury, total low levelMO AVG report only all year
001Mercury, total low levelDAILY MX report only all year
001Toxicity [acute], Ceriodaphnia dubiaMO AVG report only May
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only May
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only May
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only May
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001Solids, total dissolved- 180 deg. CMO AVG report only all year
001Solids, total dissolved- 180 deg. CDAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY MAX <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 615.1 kg/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY MAX <= 984.1 kg/d all year
002Solids, total suspendedMO AVG report only Mar, Jun, Aug, Dec
002Solids, total suspendedDAILY MX report only Mar, Jun, Aug, Dec
002Coliform, fecal MF, MFC broth, 44.5 CMO GEOMN report only Mar, Dec
002Coliform, fecal MF, MFC broth, 44.5 CDAILY MX report only Mar, Dec
002E. coli, MTEC-MFMO GEOMN report only Jun, Aug
002E. coli, MTEC-MFDAILY MX report only Jun, Aug
002OverflowsMO AVG report only all year
002OverflowsDAILY MX report only all year
002Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
002Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]MO AVG report only Mar, Jun, Aug, Dec
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only Mar, Jun, Aug, Dec
003OverflowsMO AVG report only all year
003OverflowsDAILY MX report only all year
003Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
003Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
004OverflowsMO AVG report only all year
004OverflowsDAILY MX report only all year
004Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
004Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
005OverflowsMO AVG report only all year
005OverflowsDAILY MX report only all year
005Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
005Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
006OverflowsMO AVG report only all year
006OverflowsDAILY MX report only all year
006Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
006Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
007OverflowsMO AVG report only all year
007OverflowsDAILY MX report only all year
007Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
007Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
008OverflowsMO AVG report only all year
008OverflowsDAILY MX report only all year
008Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
008Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
009OverflowsMO AVG report only all year
009OverflowsDAILY MX report only all year
009Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
009Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
010OverflowsMO AVG report only all year
010OverflowsDAILY MX report only all year
010Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
010Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
011OverflowsMO AVG report only all year
011OverflowsDAILY MX report only all year
011Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
011Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
300OverflowsMO AVG report only all year
300OverflowsDAILY MX report only all year
581Nitrogen, ammonia in bottom depositsMO AVG report only Mar, Jun, Aug, Dec
581Nitrogen, ammonia in bottom depositsDAILY MX report only Mar, Jun, Aug, Dec
581Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Jun, Aug, Dec
581Nitrogen, Kjeldahl, total [as N]DAILY MX report only Mar, Jun, Aug, Dec
581Nitrite plus nitrate in bottom depositsMO AVG report only Mar, Jun, Aug, Dec
581Nitrite plus nitrate in bottom depositsDAILY MX report only Mar, Jun, Aug, Dec
581Phosphorous, total, in bottom depositsMO AVG report only Mar, Jun, Aug, Dec
581Phosphorous, total, in bottom depositsDAILY MX report only Mar, Jun, Aug, Dec
581Potassium, in bottom depositsMO AVG report only Mar, Jun, Aug, Dec
581Potassium, in bottom depositsDAILY MX report only Mar, Jun, Aug, Dec
581Arsenic, dry weightDAILY MX <= 75 mg/kg Mar, Jun, Aug, Dec
581Cadmium, in bottom deposits [dry wgt]DAILY MX <= 85 mg/kg Mar, Jun, Aug, Dec
581Copper in bottom deposits [dry wgt]DAILY MX <= 4300 mg/kg Mar, Jun, Aug, Dec
581Lead, total dry weight [as Pb]DAILY MX <= 840 mg/kg Mar, Jun, Aug, Dec
581Nickel, tot in bottom deposits [dry wgt]DAILY MX <= 420 mg/kg Mar, Jun, Aug, Dec
581Zinc in bottom deposits [dry wgt]DAILY MX <= 7500 mg/kg Mar, Jun, Aug, Dec
581Selenium, dry weightDAILY MX <= 100 mg/kg Mar, Jun, Aug, Dec
581Biosolids weight indluding admixturesMO AVG report only Mar, Jun, Aug, Dec
581Biosolids weight indluding admixturesDAILY MX report only Mar, Jun, Aug, Dec
581Fecal coliform in sludge, CFU/gramDAILY MX <= 2000000 CFU/g Mar, Jun, Aug, Dec
581Sludge weight, dryMO AVG report only Mar, Jun, Aug, Dec
581Sludge weight, dryDAILY MX report only Mar, Jun, Aug, Dec
581Mercury, tot in bot deposits [dry wgt]DAILY MX <= 57 mg/kg Mar, Jun, Aug, Dec
581Molybdenum, sludge, total, dry weight [as Mo]DAILY MX <= 75 mg/kg Mar, Jun, Aug, Dec
586Biosolids weight indluding admixturesMO AVG report only Dec
586Biosolids weight indluding admixturesDAILY MX report only Dec
588Sludge weight, dryMO AVG report only Dec
588Sludge weight, dryDAILY MX report only Dec
601Solids, total suspendedMO AVG report only all year
601Solids, total suspendedDAILY MX report only all year
601RainfallMO AVG report only all year
601RainfallDAILY MX report only all year
601pH, maximumDAILY MX report only all year
601pH, minimumDAILY MN report only all year
601BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
601BOD, carbonaceous [5 day, 20 C]DAILY MX 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