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Sewage treatment plant, major discharger, Ironton, Ohio. NPDES permit OH0025852, in force until Aug 31, 2028. Last 12 months: over a limit 5 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 295 | ≤ 258 kg/d | 14% |
| November 2025 | Solids, total suspended, weekly maximum | 367 | ≤ 290 kg/d | 27% |
| February 2026 | Solids, total suspended, monthly average | 225 | ≤ 194 kg/d | 16% |
| February 2026 | Solids, total suspended, weekly maximum | 51.2 | ≤ 45 mg/L | 14% |
| February 2026 | Solids, total suspended, weekly maximum | 513 | ≤ 290 kg/d | 77% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 194 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 290 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphate, ortho, dissolved [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphate, ortho, dissolved [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | weekly geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | May–Oct | 001 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 240 MPN/100mL | May–Oct | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | May–Oct | 001 |
| Mercury, total low level | monthly average | ≤ 12 ng/L | all year | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | all year | 001 |
| Mercury, total low level | monthly average | ≤ .000078 kg/d | all year | 001 |
| Mercury, total low level | daily maximum | ≤ .011 kg/d | all year | 001 |
| Cyanide, free available | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cyanide, free available | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Jun | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Jun | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Jun | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Jun | 001 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 161 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 258 kg/d | all year | 001 |
| Overflows | monthly average | report only (occur/mo) | all year | 002 |
| Overflows | daily maximum | report only (occur/mo) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 002 |
| Overflows | monthly average | report only (occur/mo) | all year | 007 |
| Overflows | daily maximum | report only (occur/mo) | all year | 007 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 007 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 007 |
| Overflows | monthly average | report only (occur/mo) | all year | 008 |
| Overflows | daily maximum | report only (occur/mo) | all year | 008 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 008 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 008 |
| Overflows | monthly average | report only (occur/mo) | all year | 009 |
| Overflows | daily maximum | report only (occur/mo) | all year | 009 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 009 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 009 |
| Overflows | monthly average | report only (occur/mo) | all year | 017 |
| Overflows | daily maximum | report only (occur/mo) | all year | 017 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 017 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 017 |
| Overflows | monthly average | report only (occur/mo) | all year | 300 |
| Overflows | daily maximum | report only (occur/mo) | all year | 300 |
| Overflows | monthly average | report only (occur/mo) | all year | 304 |
| Overflows | daily maximum | report only (occur/mo) | all year | 304 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 304 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 304 |
| Overflows | monthly average | report only (occur/mo) | all year | 310 |
| Overflows | daily maximum | report only (occur/mo) | all year | 310 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 310 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 310 |
| Overflows | monthly average | report only (occur/mo) | all year | 318 |
| Overflows | daily maximum | report only (occur/mo) | all year | 318 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 318 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 318 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 588 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 588 |
| pH | daily minimum | report only (SU) | all year | 601 |
| pH | daily maximum | report only (SU) | all year | 601 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 601 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 601 |
| Rainfall | monthly average | report only (in) | all year | 601 |
| Rainfall | daily maximum | report only (in) | all year | 601 |
| Flow, maximum during 24 hr period | monthly average | report only (MGD) | all year | 601 |
| Flow, maximum during 24 hr period | daily maximum | report only (MGD) | all year | 601 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 601 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 601 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 602 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 602 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 602 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 602 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | monthly average | report only (%) | Jun | 801 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | report only (%) | Jun | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | monthly average | report only (%) | Jun | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | daily maximum | report only (%) | Jun | 801 |
Cited limits by parameter: Ohio's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/OH0025852 · MCP: https://passage-data.com/mcp