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Clay And Related Minerals, Terre Haute, Indiana. NPDES permit IN0064937, in force until Jul 31, 2029. Last 12 months: over a limit 9 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| March 2026 | 002 | pH, daily maximum | 9.1 SU | ≤ 9 SU | — |
| March 2026 | 003 | Solids, total suspended, daily maximum | 99 mg/L | ≤ 70 mg/L | 41% |
| March 2026 | 003 | Solids, total suspended, monthly average | 66.1 mg/L | ≤ 35 mg/L | 89% |
| April 2026 | 002 | Solids, total suspended, monthly average | 45.3 mg/L | ≤ 35 mg/L | 29% |
| April 2026 | 003 | Solids, total suspended, monthly average | 35.7 mg/L | ≤ 35 mg/L | 2% |
| August 2026 | 002 | Solids, total suspended, daily maximum | 108 mg/L | ≤ 70 mg/L | 54% |
| August 2026 | 002 | Solids, total suspended, monthly average | 68.55 mg/L | ≤ 35 mg/L | 96% |
| September 2026 | 003 | Solids, total suspended, daily maximum | 122 mg/L | ≤ 70 mg/L | 74% |
| September 2026 | 003 | Solids, total suspended, monthly average | 69.15 mg/L | ≤ 35 mg/L | 98% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Iron, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Aluminum, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Manganese, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Manganese, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Manganese, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 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 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Storm water flow | daily maximum | report only (MGD) | Mar, Jun, Sep, Dec | 002 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 003 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Iron, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Aluminum, total recoverable | monthly average | report only (mg/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Manganese, total recoverable | monthly average | report only (mg/L) | all year | 003 |
| Manganese, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Manganese, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Storm water flow | daily maximum | report only (MGD) | Mar, Jun, Sep, Dec | 003 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 003 |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 32 Mining and Quarrying of Nonmetallic Minerals permits in Indiana.
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