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Minerals, Ground Or Treated, Navarro County, Texas. NPDES permit TX0047791 expired Mar 17, 2025; its limits still apply. Last 12 months: no values over a limit, 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 25 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Selenium, total [as Se] | daily average | ≤ .188 mg/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ .398 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .6 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 150 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
Cited limits by parameter: Texas's rules and the federal ones.
Same industry: the 10 Stone, Clay, Glass and Concrete Products permits in Texas.
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On EPA ECHO: Facility report · DMR history
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