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Bituminous Coal - Underground, Cadiz, Ohio. NPDES permit OH0011835, in force until May 31, 2030. Last 12 months: no values over a limit, 548 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Iron, total [as Fe] | monthly average | ≤ 3000 ug/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 6000 ug/L | all year | 001 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 001 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 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 |
| Mercury, total low level | monthly average | report only (ng/L) | Dec | 001 |
| Mercury, total low level | daily maximum | report only (ng/L) | Dec | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Iron, total [as Fe] | monthly average | ≤ 3000 ug/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6000 ug/L | all year | 002 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 002 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Mercury, total low level | monthly average | report only (ng/L) | Dec | 002 |
| Mercury, total low level | daily maximum | report only (ng/L) | Dec | 002 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 006 |
| pH | daily maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 006 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Iron, total [as Fe] | monthly average | ≤ 3000 ug/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 6000 ug/L | all year | 006 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 006 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Mercury, total low level | monthly average | report only (ng/L) | Dec | 006 |
| Mercury, total low level | daily maximum | report only (ng/L) | Dec | 006 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| pH | daily minimum | ≥ 6.5 SU | all year | 007 |
| pH | daily maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Iron, total [as Fe] | monthly average | ≤ 3500 ug/L | all year | 007 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 007 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 007 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Mercury, total low level | monthly average | report only (ng/L) | Dec | 007 |
| Mercury, total low level | daily maximum | report only (ng/L) | Dec | 007 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 007 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 007 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Solids, total dissolved- 180 deg. C, monthly average outfall 001 | 2254 mg/L | new | — | — |
| Solids, total dissolved- 180 deg. C, monthly average outfall 002 | 2254 mg/L | new | — | — |
| Solids, total dissolved- 180 deg. C, monthly average outfall 007 | 1500 mg/L | new | — | — |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 38 Coal Mining permits in Ohio.
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