City of Ironton

NPDES permit OH0025852 · Major POTW · effective, expires 2028-08-31 · 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

6values over a limit
0required values missing, on 0 form(s)
0of 135 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (5), BOD, carbonaceous [5 day, 20 C] (1).

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 (115)

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 <= 194 kg/d all year
001Solids, total suspendedWKLY MAX <= 290 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
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 <= 240 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 May, Jun, Jul, Aug, Sep, Oct
001Mercury, total low levelMO AVG <= 12 ng/L all year
001Mercury, total low levelDAILY MX <= 1700 ng/L all year
001Mercury, total low levelMO AVG <= .000078 kg/d all year
001Mercury, total low levelDAILY MX <= .011 kg/d all year
001Cyanide, free availableMO AVG report only Mar, Jun, Aug, Dec
001Cyanide, free availableDAILY MX report only Mar, Jun, Aug, Dec
001Toxicity [acute], Ceriodaphnia dubiaMO AVG report only Jun
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only Jun
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only Jun
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only Jun
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001Solids, total dissolved- 180 deg. CMO AVG report only Mar, Jun, Aug, Dec
001Solids, total dissolved- 180 deg. CDAILY MX report only Mar, Jun, Aug, Dec
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 <= 161 kg/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY MAX <= 258 kg/d all year
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
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
017OverflowsMO AVG report only all year
017OverflowsDAILY MX report only all year
017Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
017Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
300OverflowsMO AVG report only all year
300OverflowsDAILY MX report only all year
304OverflowsMO AVG report only all year
304OverflowsDAILY MX report only all year
304Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
304Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
310OverflowsMO AVG report only all year
310OverflowsDAILY MX report only all year
310Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
310Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
318OverflowsMO AVG report only all year
318OverflowsDAILY MX report only all year
318Overflow volume [SS0 volume, CSO volume]MO AVG report only all year
318Overflow volume [SS0 volume, CSO volume]DAILY MX report only all year
586Biosolids weight indluding admixturesMO AVG report only Dec
586Biosolids weight indluding admixturesDAILY MX report only Dec
588Biosolids weight indluding admixturesMO AVG report only Dec
588Biosolids weight indluding admixturesDAILY MX report only Dec
601pHDAILY MN report only all year
601pHDAILY MX report only all year
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
601Flow, maximum during 24 hr periodMO AVG report only all year
601Flow, maximum during 24 hr periodDAILY MX report only all year
601Mercury, total low levelMO AVG report only all year
601Mercury, total low levelDAILY MX 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
602Bypass VolumeMO AVG report only all year
602Bypass VolumeDAILY MX report only all year
602Bypass valveMO AVG report only all year
602Bypass valveDAILY MX report only all year
801%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiaMO AVG report only Jun
801%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiaDAILY MX report only Jun
801%Effect Static Renewal 96Hr Acute Pimephales promelasMO AVG report only Jun
801%Effect Static Renewal 96Hr Acute Pimephales promelasDAILY MX report only Jun

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