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Plants facing new discharge limits — by state and pollutant

In Ohio: 134 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Nov 1, 2026 and Feb 1, 2031 (980 limits); 29 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

By pollutant: Nitrogen, ammonia total [as N] 40 · Solids, total suspended 23 · BOD, carbonaceous [5 day, 20 C] 20 · Mercury, total low level 19 · E. coli, MTEC-MF 18 · Copper, total recoverable 17 · Cyanide, free available 17 · Chlorine, total residual 16 · pH 15 · Phosphorus, total [as P] 12 · Toxicity [acute], Ceriodaphnia dubia 12 · Solids, total dissolved- 180 deg. C 11 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 11 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 10 · Zinc, total recoverable 10 · Toxicity [chronic], Ceriodaphnia dubia 9 · Selenium, total recoverable 8 · Chromium, hexavalent dissolved [as Cr] 7 · Cadmium, total recoverable 6 · Di[2-ethylhexyl] phthalate [DEHP] 6 · Lead, total recoverable 6 · Silver total recoverable 4 · Carcinogen additivity factor 2 · Nitrogen, inorganic total 2 · Oil and grease, hexane extr method 2

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDSelenium, total recoverablemonthly average 5.3 ug/L, newDec 1, 20266.5 ug/L (6 values)1.23×
New Bremen, Village ofOH0020346OHSewage plant.9 MGDSolids, total dissolved- 180 deg. Cmonthly average 1501 mg/L, newDec 1, 20261760 mg/L (11 values)1.17×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]monthly average 1 mg/L (May–Oct), newJan 1, 20276.64 mg/L (5 values)6.64×
City of OxfordOH0026930OHSewage plant, major4.2 MGDPhosphorus, total [as P]monthly average 1 mg/L, newJan 1, 20272.19 mg/L (11 values)2.19×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), newJan 1, 20274.95 mg/L (6 values)1.65×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 15 mg/L, tighterJan 1, 202715.5 mg/L (10 values)1.03×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDBOD, carbonaceous [5 day, 20 C]monthly average 10 mg/L, tighterJan 1, 202710.25 mg/L (10 values)1.02×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDPhosphorus, total [as P]monthly average 0.5 mg/L, tighterJan 1, 20270.51 mg/L (11 values)1.02×
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1684 mg/L, newMar 1, 20271898 mg/L (6 values)1.13×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDMercury, total low levelmonthly average 1.3 ng/L, tighterApr 1, 202726 ng/L (11 values)20×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDMercury, total low levelmonthly average 0.000004 kg/d, tighterApr 1, 20270.000021 kg/d (11 values)5.25×
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), newApr 1, 202715.26 mg/L (6 values)5.09×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Selenium, total recoverablemonthly average 5 ug/L, newApr 1, 202718.5 ug/L (6 values)3.7×
Elida, Village ofOH0024996OHSewage plant.8 MGDPhosphorus, total [as P]monthly average 1 mg/L, newApr 1, 20272.3 mg/L (11 values)2.3×
Elida, Village ofOH0024996OHSewage plant.8 MGDBOD, carbonaceous [5 day, 20 C]monthly average 10 mg/L, tighterApr 1, 202717.95 mg/L (11 values)1.79×
Elida, Village ofOH0024996OHSewage plant.8 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 15 mg/L, tighterApr 1, 202721.55 mg/L (11 values)1.44×
Elida, Village ofOH0024996OHSewage plant.8 MGDSolids, total suspendedweekly maximum 18 mg/L, tighterApr 1, 202723.2 mg/L (11 values)1.29×
Elida, Village ofOH0024996OHSewage plant.8 MGDSolids, total suspendedmonthly average 12 mg/L, tighterApr 1, 202715.2 mg/L (11 values)1.27×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDNitrogen, ammonia total [as N]monthly average 0.86 mg/L, tighterApr 1, 20271.06 mg/L (11 values)1.23×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDNitrogen, ammonia total [as N]weekly maximum 1.29 mg/L, tighterApr 1, 20271.54 mg/L (11 values)1.19×
Ohio Valley Coal CoOH0012661OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newMay 1, 20272295 mg/L (6 values)1.53×
Titanium Metals Corp Toronto PlantOH0010910OHIndustrial, major—Chlorine, total residualdaily maximum 0.038 mg/L, newJun 1, 20270.47 mg/L (3 values)12.4×
Hamler, Village ofOH0021105OHSewage plant.113 MGDMercury, total low levelmonthly average 1.3 ng/L, newJun 1, 20277.18 ng/L (4 values)5.52×
Guggisberg CheeseOH0004367OHIndustrial—Phosphorus, total [as P]monthly average 10 mg/L, tighterJun 1, 202711.17 mg/L (11 values)1.12×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20273480 mg/L (11 values)2.32×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 2232 mg/L, newAug 1, 20275020 mg/L (11 values)2.25×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272730 mg/L (7 values)1.82×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272210 mg/L (3 values)1.47×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272055 mg/L (6 values)1.37×
Plain City, Village ofOH0027057OHSewage plant1.25 MGDSolids, total dissolved- 180 deg. Cmonthly average 891 mg/L, newSep 1, 20271670 mg/L (11 values)1.87×
Dover Chemical CorporationOH0007269OHIndustrial, major—.alpha.-BHC dissolvedmonthly average 0.0039 ug/L, tighterOct 1, 20270.026 ug/L (11 values)6.67×
Dover Chemical CorporationOH0007269OHIndustrial, major—.alpha.-BHC dissolvedmonthly average 0.000075 kg/d, tighterOct 1, 20270.000428 kg/d (11 values)5.71×
Gibsonburg WWTPOH0029122OHSewage plant.5 MGDPhosphorus, total [as P]monthly average 1 mg/L, newNov 1, 20272.5 mg/L (11 values)2.5×
Village of WoodvilleOH0020591OHSewage plant.3 MGDPhosphorus, total [as P]monthly average 1 mg/L, newDec 1, 20273.32 mg/L (11 values)3.32×
Village of Fort RecoveryOH0025160OHSewage plant.25 MGDE. coli, MTEC-MFmonthly geometric mean 126 MPN/100mL (May–Oct), newJan 1, 2028405.8 MPN/100mL (5 values)3.22×
Thomas Steel Strip CorporationOH0011363OHIndustrial, major—Zinc, total recoverabledaily maximum 330 ug/L, newJan 1, 2028633 ug/L (11 values)1.92×
Huntsman Advanced Materials Americas, LLC.OH0029149OHIndustrial, major—Copper, total recoverablemonthly average 15 ug/L (Mar, Jun, Sep, Dec), newMar 1, 202816.9 ug/L (3 values)1.13×
Wieland ChaseOH0002941OHIndustrial—Copper, total recoverabledaily maximum 60 ug/L, newApr 1, 202861 ug/L (11 values)1.02×
Titanium Metals Corp Toronto PlantOH0010910OHIndustrial, major—Chlorine, total residualdaily maximum 0.038 mg/L, newJun 1, 20280.47 mg/L (3 values)12.4×
Detrex Corporation, Chemicals DivisionOH0001872OHIndustrial, major—Cyanide, free availablemonthly average 5.2 ug/L, newJun 1, 20287 ug/L (3 values)1.35×
City of Strongsville C WWTPOH0033707OHSewage plant1.8 MGDCyanide, free availablemonthly average 5.2 ug/L, newJul 1, 202811.25 ug/L (8 values)2.16×
Modern Management Solutions dba PM EstateOH0044300OHIndustrial.05 MGDPhosphorus, total [as P]daily maximum 1 mg/L, tighterAug 1, 20281.04 mg/L (11 values)1.04×
Modern Management Solutions dba PM EstateOH0044300OHIndustrial.05 MGDPhosphorus, total [as P]monthly average 1 mg/L, tighterAug 1, 20281.04 mg/L (11 values)1.04×
City of Norwalk WWTPOH0052604OHSewage plant, major3.5 MGDCopper, total recoverablemonthly average 20 ug/L, newAug 1, 202820.5 ug/L (6 values)1.02×
Madison County Sewer District #2OH0130915OHIndustrial.3 MGDCopper, total recoverablemonthly average 38 ug/L, tighterSep 1, 202846 ug/L (11 values)1.21×
Village of Antwerp WWTPOH0022195OHSewage plant.33 MGDNitrogen, ammonia total [as N]monthly average 0.46 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), newAug 1, 202925.7 mg/L (6 values)55.9×
Village of Antwerp WWTPOH0022195OHSewage plant.33 MGDNitrogen, ammonia total [as N]monthly average 0.2 mg/L (May–Oct), newAug 1, 20297.38 mg/L (5 values)36.9×
City of Norwalk WWTPOH0052604OHSewage plant, major3.5 MGDCopper, total recoverablemonthly average 20 ug/L, newAug 1, 202920.5 ug/L (6 values)1.02×
Cooper Farms Cooked MeatsOH0132772OHIndustrial—Residue, tot fltrble [dried at 105 C]monthly average 3375 mg/L, newJan 1, 20306210 mg/L (7 values)1.84×
City of Mount VernonOH0026662OHSewage plant, major5 MGDPhosphorus, total [as P]monthly average 1 mg/L, newApr 1, 20302.8 mg/L (11 values)2.8×
Girard, City ofOH0025364OHSewage plant, major5 MGDCyanide, free availablemonthly average 12 ug/L, newNov 1, 202610.8 ug/L (7 values)0.9×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDNitrogen, ammonia total [as N]weekly maximum 0.42 mg/L (May–Oct), tighterNov 1, 20260.2 mg/L (4 values)0.476×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDNitrogen, ammonia total [as N]monthly average 0.28 mg/L (May–Oct), tighterNov 1, 20260.095 mg/L (4 values)0.339×
KYOCERA SENCO Industrial Tools, Inc.OH0046507OHIndustrial—BOD, carbonaceous [5 day, 20 C]monthly average 0.3 kg/d, tighterNov 1, 20260.081 kg/d (3 values)0.27×
Girard, City ofOH0025364OHSewage plant, major5 MGDCyanide, free availabledaily maximum 46 ug/L, newNov 1, 202610.8 ug/L (7 values)0.235×
KYOCERA SENCO Industrial Tools, Inc.OH0046507OHIndustrial—BOD, carbonaceous [5 day, 20 C]weekly maximum 0.45 kg/d, tighterNov 1, 20260.081 kg/d (3 values)0.18×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDCopper, total recoverablemonthly average 32 ug/L, tighterNov 1, 20264.5 ug/L (8 values)0.141×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDNitrogen, ammonia total [as N]weekly maximum 0.67 kg/d (May–Oct), tighterNov 1, 20260.0875 kg/d (4 values)0.131×
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDNitrogen, ammonia total [as N]monthly average 6.7 mg/L (May–Oct), newNov 1, 20260.643 mg/L (5 values)0.096×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDCopper, total recoverabledaily maximum 52 ug/L, tighterNov 1, 20264.5 ug/L (8 values)0.0865×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDNitrogen, ammonia total [as N]monthly average 0.45 kg/d (May–Oct), tighterNov 1, 20260.0375 kg/d (4 values)0.0833×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDCopper, total recoverablemonthly average 0.051 kg/d, tighterNov 1, 20260.00185 kg/d (8 values)0.0363×
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDCopper, total recoverabledaily maximum 0.083 kg/d, tighterNov 1, 20260.00185 kg/d (8 values)0.0223×
FirstEnergy Generation LLCOH0011525OHIndustrial, major—Copper, total recoverabledaily maximum 15 ug/L, tighterNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDCyanide, free availabledaily maximum 0.87 kg/d, newNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDCyanide, free availablemonthly average 0.23 kg/d, newNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDSelenium, total recoverabledaily maximum 62 ug/L, newNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDSelenium, total recoverabledaily maximum 1.2 kg/d, newNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDSelenium, total recoverablemonthly average 0.095 kg/d, newNov 1, 2026under 3 values—
Girard, City ofOH0025364OHSewage plant, major5 MGDSelenium, total recoverablemonthly average 5 ug/L, newNov 1, 2026under 3 values—
KYOCERA SENCO Industrial Tools, Inc.OH0046507OHIndustrial—Solids, total suspendedmonthly average 0.36 kg/d, tighterNov 1, 2026under 3 values—
KYOCERA SENCO Industrial Tools, Inc.OH0046507OHIndustrial—Solids, total suspendedweekly maximum 0.55 kg/d, tighterNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDCyanide, free availabledaily maximum 41 ug/L, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDCyanide, free availabledaily maximum 0.29 kg/d, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDCyanide, free availablemonthly average 0.071 kg/d, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDCyanide, free availablemonthly average 9.9 ug/L, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDDi[2-ethylhexyl] phthalate [DEHP]daily maximum 2100 ug/L, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDDi[2-ethylhexyl] phthalate [DEHP]monthly average 1.4 ug/L, newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDNitrogen, ammonia total [as N]monthly average 48.2 kg/d (May–Oct), newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDNitrogen, ammonia total [as N]weekly maximum 72.6 kg/d (May–Oct), newNov 1, 2026under 3 values—
Mahoning County CommissionersOH0024325OHSewage plant, major1.9 MGDNitrogen, ammonia total [as N]weekly maximum 10.1 mg/L (May–Oct), newNov 1, 2026under 3 values—
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDMercury, total low leveldaily maximum 1700 ng/L, newNov 1, 2026under 3 values—
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDMercury, total low leveldaily maximum 0.0027 kg/d, newNov 1, 2026under 3 values—
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDMercury, total low levelmonthly average 0.000019 kg/d, newNov 1, 2026under 3 values—
North Lewisburg, Village ofOH0023582OHSewage plant.42 MGDMercury, total low levelmonthly average 12 ng/L, newNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDCadmium, total recoverabledaily maximum 15 ug/L, newNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDCadmium, total recoverabledaily maximum 2 kg/d, newNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDCadmium, total recoverablemonthly average 2.72 ug/L, newNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDCadmium, total recoverablemonthly average 0.36 kg/d, newNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDDi[2-ethylhexyl] phthalate [DEHP]monthly average 0.19 kg/d, tighterNov 1, 2026under 3 values—
Youngstown, City ofOH0028223OHSewage plant, major35 MGDDi[2-ethylhexyl] phthalate [DEHP]monthly average 1.4 ug/L, tighterNov 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDpHdaily maximum 9 SU (Mar, Jun, Aug, Dec), newDec 1, 20267.95 SU (4 values)0.883×
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDSolids, total suspendedmonthly average 12 mg/L (Mar, Jun, Aug, Dec), newDec 1, 202610.5 mg/L (4 values)0.875×
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDDibromochloromethanemonthly average 150 ug/L, newDec 1, 202684.6 ug/L (4 values)0.564×
City of WarrenOH0027987OHSewage plant, major16 MGDMercury, total low levelmonthly average 12 ng/L, newDec 1, 20266.55 ng/L (11 values)0.546×
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDBOD, carbonaceous [5 day, 20 C]monthly average 10 mg/L (Mar, Jun, Aug, Dec), newDec 1, 20263.78 mg/L (4 values)0.378×
Waynesfield, Village ofOH0028029OHSewage plant.123 MGDNitrogen, ammonia total [as N]weekly maximum 2.4 mg/L (May–Oct), tighterDec 1, 20260.49 mg/L (4 values)0.204×
Waynesfield, Village ofOH0028029OHSewage plant.123 MGDNitrogen, ammonia total [as N]monthly average 0.74 kg/d (May–Oct), tighterDec 1, 20260.13 kg/d (4 values)0.176×
Struthers, CityOH0027600OHSewage plant, major6 MGDCyanide, free availablemonthly average 9.9 ug/L, newDec 1, 20261.55 ug/L (3 values)0.157×
Waynesfield, Village ofOH0028029OHSewage plant.123 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (May–Oct), tighterDec 1, 20260.25 mg/L (4 values)0.156×
Waynesfield, Village ofOH0028029OHSewage plant.123 MGDNitrogen, ammonia total [as N]weekly maximum 1.1 kg/d (May–Oct), tighterDec 1, 20260.17 kg/d (4 values)0.155×
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDSelenium, total recoverabledaily maximum 72 ug/L, newDec 1, 20266.5 ug/L (6 values)0.0903×
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDCarcinogen additivity factordaily maximum 1 col unit, newDec 1, 20260.0432 col unit (10 values)0.0432×
Struthers, CityOH0027600OHSewage plant, major6 MGDCyanide, free availabledaily maximum 41 ug/L, newDec 1, 20261.55 ug/L (3 values)0.0378×
City of Wooster-Water Resource RecoveryFacilityOH0028185OHSewage plant, major7.5 MGDCadmium, total recoverablemonthly average 5.8 ug/L, newDec 1, 20260.215 ug/L (4 values)0.0371×
City of Wooster-Water Resource RecoveryFacilityOH0028185OHSewage plant, major7.5 MGDCadmium, total recoverabledaily maximum 14 ug/L, newDec 1, 20260.4 ug/L (4 values)0.0286×
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDDibromochloromethanedaily maximum 3365 ug/L, newDec 1, 202684.6 ug/L (4 values)0.0251×
City of WarrenOH0027987OHSewage plant, major16 MGDMercury, total low leveldaily maximum 1700 ng/L, newDec 1, 20269.04 ng/L (11 values)0.00532×
City of Lancaster WPC DeptOH0136603OHIndustrial, major4 MGDMercury, total low leveldaily maximum 0.026 kg/d, newDec 1, 2026under 3 values—
City of Lancaster WPC DeptOH0136603OHIndustrial, major4 MGDMercury, total low leveldaily maximum 1700 ng/L, newDec 1, 2026under 3 values—
City of Lancaster WPC DeptOH0136603OHIndustrial, major4 MGDMercury, total low levelmonthly average 0.00018 kg/d, newDec 1, 2026under 3 values—
City of Lancaster WPC DeptOH0136603OHIndustrial, major4 MGDMercury, total low levelmonthly average 12 ng/L, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDCadmium, total recoverabledaily maximum 0.59 kg/d, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDCadmium, total recoverabledaily maximum 26 ug/L, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDCadmium, total recoverablemonthly average 0.17 kg/d, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDCadmium, total recoverablemonthly average 7.7 ug/L, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDDibromochloromethanedaily maximum 76 kg/d, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDDibromochloromethanemonthly average 3.4 kg/d, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDSelenium, total recoverabledaily maximum 1.6 kg/d, newDec 1, 2026under 3 values—
City of Wapakoneta WRFOH0027952OHSewage plant, major6 MGDSelenium, total recoverablemonthly average 0.12 kg/d, newDec 1, 2026under 3 values—
City of WarrenOH0027987OHSewage plant, major16 MGDMercury, total low leveldaily maximum 0.1 kg/d, newDec 1, 2026under 3 values—
City of WarrenOH0027987OHSewage plant, major16 MGDMercury, total low levelmonthly average 0.00073 kg/d, newDec 1, 2026under 3 values—
City of Wooster-Water Resource RecoveryFacilityOH0028185OHSewage plant, major7.5 MGDCadmium, total recoverabledaily maximum 0.4 kg/d, newDec 1, 2026under 3 values—
City of Wooster-Water Resource RecoveryFacilityOH0028185OHSewage plant, major7.5 MGDCadmium, total recoverablemonthly average 0.17 kg/d, newDec 1, 2026under 3 values—
Lancaster, City of Municipal BldgOH0026026OHSewage plant, major10 MGDCyanide, free availabledaily maximum 1.9 kg/d, newDec 1, 2026under 3 values—
Lancaster, City of Municipal BldgOH0026026OHSewage plant, major10 MGDCyanide, free availabledaily maximum 50 ug/L, newDec 1, 2026under 3 values—
Lancaster, City of Municipal BldgOH0026026OHSewage plant, major10 MGDCyanide, free availablemonthly average 0.49 kg/d, newDec 1, 2026under 3 values—
Lancaster, City of Municipal BldgOH0026026OHSewage plant, major10 MGDCyanide, free availablemonthly average 13 ug/L, newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDBOD, carbonaceous [5 day, 20 C]monthly average 0.15 kg/d (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 0.23 kg/d (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 15 mg/L (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDChlorine, total residualdaily maximum 0.019 mg/L (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDE. coli, MTEC-MFmonthly geometric mean 126 MPN/100mL (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDE. coli, MTEC-MFweekly geometric mean 284 MPN/100mL (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]monthly average 3 mg/L (Mar, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]monthly average 0.045 kg/d (Mar, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]monthly average 1 mg/L (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]monthly average 0.015 kg/d (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]weekly maximum 0.068 kg/d (Mar, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]weekly maximum 4.5 mg/L (Mar, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]weekly maximum 0.023 kg/d (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDNitrogen, ammonia total [as N]weekly maximum 1.5 mg/L (Jun, Aug), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDSolids, total suspendedmonthly average 0.18 kg/d (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDSolids, total suspendedweekly maximum 18 mg/L (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
Madison Road EnterpriseOH0151748OHIndustrial.004 MGDSolids, total suspendedweekly maximum 0.27 kg/d (Mar, Jun, Aug, Dec), newDec 1, 2026under 3 values—
New Bremen, Village ofOH0020346OHSewage plant.9 MGDSolids, total dissolved- 180 deg. Cmonthly average 5120 kg/d, newDec 1, 2026under 3 values—
Struthers, CityOH0027600OHSewage plant, major6 MGDCyanide, free availabledaily maximum 0.93 kg/d, newDec 1, 2026under 3 values—
Struthers, CityOH0027600OHSewage plant, major6 MGDCyanide, free availablemonthly average 0.22 kg/d, newDec 1, 2026under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDPhosphorus, total [as P]weekly maximum 0.75 mg/L, tighterJan 1, 20270.6 mg/L (11 values)0.8×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDSolids, total suspendedmonthly average 12 mg/L, tighterJan 1, 20277.5 mg/L (11 values)0.625×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDMercury, total low levelmonthly average 1.9 ng/L, tighterJan 1, 20271.1 ng/L (11 values)0.579×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDSolids, total suspendedweekly maximum 18 mg/L, tighterJan 1, 20279.5 mg/L (11 values)0.528×
Village of Saint ParisOH0021806OHSewage plant.5 MGDNitrogen, ammonia total [as N]weekly maximum 1.4 mg/L (May–Oct), tighterJan 1, 20270.7 mg/L (5 values)0.5×
Village of Saint ParisOH0021806OHSewage plant.5 MGDNitrogen, ammonia total [as N]monthly average 0.91 mg/L (May–Oct), tighterJan 1, 20270.39 mg/L (5 values)0.429×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDPhosphorus, total [as P]monthly average 4.5 kg/d, tighterJan 1, 20271.4 kg/d (11 values)0.311×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 140 kg/d, tighterJan 1, 202743 kg/d (10 values)0.307×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDBOD, carbonaceous [5 day, 20 C]monthly average 91 kg/d, tighterJan 1, 202726.5 kg/d (10 values)0.291×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDPhosphorus, total [as P]weekly maximum 6.8 kg/d, tighterJan 1, 20271.8 kg/d (11 values)0.265×
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDNitrogen, ammonia total [as N]weekly maximum 2.7 mg/L (May–Oct), tighterJan 1, 20270.47 mg/L (5 values)0.174×
Village of Saint ParisOH0021806OHSewage plant.5 MGDNitrogen, ammonia total [as N]weekly maximum 2.6 kg/d (May–Oct), tighterJan 1, 20270.45 kg/d (5 values)0.173×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDSolids, total suspendedmonthly average 110 kg/d, tighterJan 1, 202718 kg/d (11 values)0.164×
Village of Saint ParisOH0021806OHSewage plant.5 MGDNitrogen, ammonia total [as N]monthly average 1.7 kg/d (May–Oct), tighterJan 1, 20270.27 kg/d (5 values)0.159×
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDSolids, total suspendedweekly maximum 160 kg/d, tighterJan 1, 202723 kg/d (11 values)0.144×
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDNitrogen, ammonia total [as N]monthly average 1.8 mg/L (May–Oct), tighterJan 1, 20270.26 mg/L (5 values)0.144×
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDNitrogen, ammonia total [as N]weekly maximum 82 kg/d (May–Oct), tighterJan 1, 20278.3 kg/d (5 values)0.101×
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDNitrogen, ammonia total [as N]monthly average 55 kg/d (May–Oct), tighterJan 1, 20274.4 kg/d (5 values)0.08×
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDDi[2-ethylhexyl] phthalate [DEHP]daily maximum 5.2 kg/d, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDDi[2-ethylhexyl] phthalate [DEHP]daily maximum 1155 ug/L, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDDi[2-ethylhexyl] phthalate [DEHP]monthly average 8.9 ug/L, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDDi[2-ethylhexyl] phthalate [DEHP]monthly average 0.04 kg/d, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDSilver total recoverabledaily maximum 9.9 ug/L, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDSilver total recoverabledaily maximum 0.045 kg/d, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDSilver total recoverablemonthly average 0.0064 kg/d, newJan 1, 2027under 3 values—
Brookville, City ofOH0020605OHSewage plant, major1.2 MGDSilver total recoverablemonthly average 1.4 ug/L, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDChromium, hexavalent dissolved [as Cr]daily maximum 20 ug/L, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDChromium, hexavalent dissolved [as Cr]daily maximum 0.32 kg/d, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDChromium, hexavalent dissolved [as Cr]monthly average 15 ug/L, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDChromium, hexavalent dissolved [as Cr]monthly average 0.24 kg/d, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDPhosphorus, total [as P]monthly average 16 kg/d, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDPhosphorus, total [as P]weekly maximum 24 kg/d, newJan 1, 2027under 3 values—
City of OxfordOH0026930OHSewage plant, major4.2 MGDPhosphorus, total [as P]weekly maximum 1.5 mg/L, newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]monthly average 27 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]monthly average 9.1 kg/d (May–Oct), newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]weekly maximum 41 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]weekly maximum 14 kg/d (May–Oct), newJan 1, 2027under 3 values—
Erie Co Dept of Environmental ServicesOH0053082OHSewage plant, major2.4 MGDNitrogen, ammonia total [as N]weekly maximum 1.5 mg/L (May–Oct), newJan 1, 2027under 3 values—
New London Hills Water Reclamation FacilityOH0118826OHIndustrial.02 MGDNitrogen, ammonia total [as N]monthly average 1 mg/L (May–Oct), tighterJan 1, 2027under 3 values—
New London Hills Water Reclamation FacilityOH0118826OHIndustrial.02 MGDNitrogen, ammonia total [as N]monthly average 0.076 kg/d (May–Oct), tighterJan 1, 2027under 3 values—
New London Hills Water Reclamation FacilityOH0118826OHIndustrial.02 MGDNitrogen, ammonia total [as N]weekly maximum 1.5 mg/L (May–Oct), tighterJan 1, 2027under 3 values—
New London Hills Water Reclamation FacilityOH0118826OHIndustrial.02 MGDNitrogen, ammonia total [as N]weekly maximum 0.11 kg/d (May–Oct), tighterJan 1, 2027under 3 values—
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Jun, Oct), newJan 1, 2027under 3 values—
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDToxicity [chronic], Ceriodaphnia dubiamonthly average 2.23 tox chronic (Jun, Oct), newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDChromium, hexavalent dissolved [as Cr]daily maximum 18 ug/L, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDChromium, hexavalent dissolved [as Cr]daily maximum 0.22 kg/d, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDChromium, hexavalent dissolved [as Cr]monthly average 0.15 kg/d, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDChromium, hexavalent dissolved [as Cr]monthly average 12 ug/L, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDSelenium, total recoverabledaily maximum 0.84 kg/d, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDSelenium, total recoverabledaily maximum 69 ug/L, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDSelenium, total recoverablemonthly average 5.6 ug/L, newJan 1, 2027under 3 values—
Pickerington Wastewater Treatment PlantOH0031119OHSewage plant, major3.2 MGDSelenium, total recoverablemonthly average 0.068 kg/d, newJan 1, 2027under 3 values—
Wheelersburg WWTP SD No 2OH0050016OHSewage plant, major1.2 MGDMercury, total low levelmonthly average 12 ng/L, newFeb 1, 20275.6 ng/L (11 values)0.467×
Wheelersburg WWTP SD No 2OH0050016OHSewage plant, major1.2 MGDMercury, total low leveldaily maximum 1700 ng/L, newFeb 1, 20275.6 ng/L (11 values)0.00329×
Bluffton WWTPOH0020851OHSewage plant, major1.9 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum 1 tox acute (May, Nov), newFeb 1, 2027under 3 values—
Bluffton WWTPOH0020851OHSewage plant, major1.9 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]monthly average 1 tox chronic (May, Nov), newFeb 1, 2027under 3 values—
Durez CorporationOH0006769OHIndustrial, major—Cyanide, free availabledaily maximum 67 ug/L, newFeb 1, 2027under 3 values—
Durez CorporationOH0006769OHIndustrial, major—Cyanide, free availabledaily maximum 0.046 kg/d, newFeb 1, 2027under 3 values—
Durez CorporationOH0006769OHIndustrial, major—Cyanide, free availablemonthly average 0.013 kg/d, newFeb 1, 2027under 3 values—
Durez CorporationOH0006769OHIndustrial, major—Cyanide, free availablemonthly average 19 ug/L, newFeb 1, 2027under 3 values—
Mike's SanitationOH0132390OHIndustrial—BOD, carbonaceous [5 day, 20 C]monthly average 40 mg/L (Jul–Sep), newFeb 1, 2027under 3 values—
Mike's SanitationOH0132390OHIndustrial—E. coli, MTEC-MFdaily maximum 126 MPN/100mL (Jul–Sep), newFeb 1, 2027under 3 values—
Mike's SanitationOH0132390OHIndustrial—Oil and grease, hexane extr methoddaily maximum 10 mg/L (Jul–Sep), newFeb 1, 2027under 3 values—
Mike's SanitationOH0132390OHIndustrial—Solids, total suspendedmonthly average 45 mg/L (Jul–Sep), newFeb 1, 2027under 3 values—
Mike's SanitationOH0132390OHIndustrial—pHdaily maximum 9 SU (Jul–Sep), newFeb 1, 2027under 3 values—
Wheelersburg WWTP SD No 2OH0050016OHSewage plant, major1.2 MGDMercury, total low leveldaily maximum 0.0077 kg/d, newFeb 1, 2027under 3 values—
Wheelersburg WWTP SD No 2OH0050016OHSewage plant, major1.2 MGDMercury, total low levelmonthly average 0.000055 kg/d, newFeb 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1635 mg/L, newMar 1, 20271641 mg/L (4 values)1×
LaGrange WPCPOH0046221OHSewage plant.72 MGDCyanide, free availablemonthly average 5.2 ug/L (Mar, Jun, Sep, Dec), newMar 1, 20274.1 ug/L (3 values)0.788×
Kraton Polymers US LLCOH0007030OHIndustrial, major—Cobalt, total recoverabledaily maximum 440 ug/L, newMar 1, 2027163 ug/L (11 values)0.37×
LaGrange WPCPOH0046221OHSewage plant.72 MGDCyanide, free availabledaily maximum 22 ug/L (Mar, Jun, Sep, Dec), newMar 1, 20274.1 ug/L (3 values)0.186×
Middle Point, Village ofOH0021423OHSewage plant.08 MGDE. coli, MTEC-MFweekly geometric mean 284 MPN/100mL (May–Oct), tighterMar 1, 202727 MPN/100mL (5 values)0.0951×
Middle Point, Village ofOH0021423OHSewage plant.08 MGDE. coli, MTEC-MFmonthly geometric mean 126 MPN/100mL (May–Oct), tighterMar 1, 20278.86 MPN/100mL (5 values)0.0703×
City of CrestlineOH0020664OHSewage plant, major.95 MGDMercury, total low leveldaily maximum 0.00611 kg/d, tighterMar 1, 20270.0000043 kg/d (10 values)0.000704×
City of CrestlineOH0020664OHSewage plant, major.95 MGDToxicity [chronic], Ceriodaphnia dubiamonthly average 1.02 tox chronic (Mar, Jun, Aug, Dec), tighterMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1725 mg/L, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 11800 kg/d, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 14000 kg/d, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 18600 kg/d, newMar 1, 2027under 3 values—
Kraton Polymers US LLCOH0007030OHIndustrial, major—Cobalt, total recoverabledaily maximum 1.59 kg/d, newMar 1, 2027under 3 values—
Kraton Polymers US LLCOH0007030OHIndustrial, major—Cyanide, total [as CN]daily maximum 0.044 mg/L (Aug), tighterMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDCyanide, free availabledaily maximum 0.06 kg/d (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDCyanide, free availablemonthly average 0.014 kg/d (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDLead, total recoverabledaily maximum 310 ug/L (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDLead, total recoverabledaily maximum 0.84 kg/d (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDLead, total recoverablemonthly average 0.046 kg/d (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
LaGrange WPCPOH0046221OHSewage plant.72 MGDLead, total recoverablemonthly average 17 ug/L (Mar, Jun, Sep, Dec), newMar 1, 2027under 3 values—
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Fluoride, total [as F]monthly average 2.2 mg/L, newApr 1, 20272.1 mg/L (11 values)0.955×
Mt Hope WWTPOH0092282OHSewage plant.1 MGDSolids, total dissolved- 180 deg. Cmonthly average 1577 mg/L (Jan, Mar, May, Jul, Sep, Nov), newApr 1, 20271300 mg/L (5 values)0.824×
Elida, Village ofOH0024996OHSewage plant.8 MGDBOD, carbonaceous [5 day, 20 C]monthly average 30 kg/d, tighterApr 1, 202722.41 kg/d (11 values)0.747×
Elida, Village ofOH0024996OHSewage plant.8 MGDBOD, carbonaceous [5 day, 20 C]weekly maximum 45 kg/d, tighterApr 1, 202731.39 kg/d (11 values)0.698×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Lead, total recoverablemonthly average 30 ug/L, tighterApr 1, 202717 ug/L (11 values)0.567×
Elida, Village ofOH0024996OHSewage plant.8 MGDSolids, total suspendedweekly maximum 55 kg/d, tighterApr 1, 202729.3 kg/d (11 values)0.533×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Copper, total recoverablemonthly average 27 ug/L, tighterApr 1, 202713 ug/L (11 values)0.481×
Elida, Village ofOH0024996OHSewage plant.8 MGDSolids, total suspendedmonthly average 36 kg/d, tighterApr 1, 202717.2 kg/d (11 values)0.478×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Copper, total recoverablemonthly average 0.36 kg/d, tighterApr 1, 20270.12 kg/d (11 values)0.333×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Lead, total recoverablemonthly average 0.4 kg/d, tighterApr 1, 20270.13 kg/d (11 values)0.325×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Selenium, total recoverabledaily maximum 62 ug/L, newApr 1, 202718.5 ug/L (6 values)0.298×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Copper, total recoverabledaily maximum 44 ug/L, tighterApr 1, 202713 ug/L (11 values)0.295×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDNitrogen, ammonia total [as N]monthly average 2.7 kg/d, tighterApr 1, 20270.78 kg/d (11 values)0.289×
Village of Columbus Grove WWTPOH0024759OHSewage plant.82 MGDNitrogen, ammonia total [as N]weekly maximum 4 kg/d, tighterApr 1, 20271.11 kg/d (11 values)0.278×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Zinc, total recoverabledaily maximum 342 ug/L, tighterApr 1, 202793 ug/L (11 values)0.272×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Nickel, total recoverablemonthly average 151 ug/L, tighterApr 1, 202736 ug/L (11 values)0.238×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Copper, total recoverabledaily maximum 0.58 kg/d, tighterApr 1, 20270.12 kg/d (11 values)0.207×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Zinc, total recoverabledaily maximum 4.53 kg/d, tighterApr 1, 20270.8 kg/d (11 values)0.177×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDNitrogen, ammonia total [as N]weekly maximum 1.3 kg/d (May–Oct), tighterApr 1, 20270.18 kg/d (3 values)0.138×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Nickel, total recoverablemonthly average 2 kg/d, tighterApr 1, 20270.27 kg/d (11 values)0.135×
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]monthly average 1 mg/L (May–Oct), newApr 1, 20270.13 mg/L (5 values)0.13×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDMercury, total low levelmonthly average 12 ng/L, newApr 1, 20271.5 ng/L (4 values)0.125×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDNitrogen, ammonia total [as N]weekly maximum 0.9 mg/L (May–Oct), tighterApr 1, 20270.1 mg/L (3 values)0.111×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDNitrogen, ammonia total [as N]monthly average 0.6 mg/L (May–Oct), tighterApr 1, 20270.053 mg/L (3 values)0.0883×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Silver total recoverabledaily maximum 13 ug/L, tighterApr 1, 20270.895 ug/L (8 values)0.0688×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDNitrogen, ammonia total [as N]monthly average 0.84 kg/d (May–Oct), tighterApr 1, 20270.048 kg/d (3 values)0.0571×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Silver total recoverabledaily maximum 0.17 kg/d, tighterApr 1, 20270.0078 kg/d (8 values)0.0459×
Botkins,Village OfOH0022217OHSewage plant.5 MGDZinc, total recoverabledaily maximum 653 ug/L, newApr 1, 202718 ug/L (11 values)0.0276×
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDMercury, total low leveldaily maximum 1700 ng/L, newApr 1, 20271.5 ng/L (4 values)0.000882×
Botkins,Village OfOH0022217OHSewage plant.5 MGDZinc, total recoverabledaily maximum 1.2 kg/d, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDButyl benzyl phthalatedaily maximum 1.5 kg/d (Mar, Jun, Sep, Dec), newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDButyl benzyl phthalatedaily maximum 130 ug/L (Mar, Jun, Sep, Dec), newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDButyl benzyl phthalatemonthly average 0.011 kg/d (Mar, Jun, Sep, Dec), newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDButyl benzyl phthalatemonthly average 1 ug/L (Mar, Jun, Sep, Dec), newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDLead, total recoverabledaily maximum 3.4 kg/d, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDLead, total recoverabledaily maximum 300 ug/L, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDLead, total recoverablemonthly average 16 ug/L, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDLead, total recoverablemonthly average 0.18 kg/d, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDSelenium, total [as Se]daily maximum 62 ug/L, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDSelenium, total [as Se]daily maximum 0.7 kg/d, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDSelenium, total [as Se]monthly average 0.057 kg/d, newApr 1, 2027under 3 values—
City of CelinaOH0020320OHSewage plant, major3 MGDSelenium, total [as Se]monthly average 5 ug/L, newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDChromium, hexavalent dissolved [as Cr]daily maximum 31 ug/L (Jun, Dec), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDChromium, hexavalent dissolved [as Cr]daily maximum 0.094 kg/d (Jun, Dec), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]monthly average 3 kg/d (May–Oct), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]monthly average 9.1 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]weekly maximum 1.5 mg/L (May–Oct), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]weekly maximum 4.5 kg/d (May–Oct), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDNitrogen, ammonia total [as N]weekly maximum 14 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDPhosphorus, total [as P]monthly average 3 kg/d, newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDPhosphorus, total [as P]weekly maximum 4.5 kg/d, newApr 1, 2027under 3 values—
Elida, Village ofOH0024996OHSewage plant.8 MGDPhosphorus, total [as P]weekly maximum 1.5 mg/L, newApr 1, 2027under 3 values—
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDMercury, total low leveldaily maximum 0.0024 kg/d, newApr 1, 2027under 3 values—
Jackson Center, Village ofOH0025861OHSewage plant.37 MGDMercury, total low levelmonthly average 0.000017 kg/d, newApr 1, 2027under 3 values—
Mt Hope WWTPOH0092282OHSewage plant.1 MGDSolids, total dissolved- 180 deg. Cmonthly average 600 kg/d (Jan, Mar, May, Jul, Sep, Nov), newApr 1, 2027under 3 values—
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Chlorine, total residualdaily maximum 0.019 mg/L, newApr 1, 2027under 3 values—
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Fluoride, total [as F]monthly average 29.1 kg/d, newApr 1, 2027under 3 values—
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Selenium, total recoverabledaily maximum 0.82 kg/d, newApr 1, 2027under 3 values—
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Selenium, total recoverablemonthly average 0.066 kg/d, newApr 1, 2027under 3 values—
Eaton Homes WWTPOH0026140OHSewage plant.2 MGDNitrogen, ammonia total [as N]monthly average 1.4 mg/L (May–Oct), tighterMay 1, 20270.12 mg/L (5 values)0.0857×
Eaton Homes WWTPOH0026140OHSewage plant.2 MGDNitrogen, ammonia total [as N]weekly maximum 2.1 mg/L (May–Oct), tighterMay 1, 20270.13 mg/L (5 values)0.0619×
Eaton Homes WWTPOH0026140OHSewage plant.2 MGDNitrogen, ammonia total [as N]monthly average 1.06 kg/d (May–Oct), tighterMay 1, 20270.064 kg/d (5 values)0.0604×
Eaton Homes WWTPOH0026140OHSewage plant.2 MGDNitrogen, ammonia total [as N]weekly maximum 1.59 kg/d (May–Oct), tighterMay 1, 20270.091 kg/d (5 values)0.0572×

The 300 soonest limits are listed, plants already above them first; all 980 are in the JSON at /dmr/data/upcoming.json.

Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.

Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.

For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=OH&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states