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Clay And Related Minerals, Malvern, Arkansas. NPDES permit AR0043354, in force until Feb 28, 2027. Last 12 months: no values over a limit, 8 required values missing, 6 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year |
| Sulfate, total [as SO4] | monthly average | report only (lb/d) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (lb/d) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Solids, total dissolved | monthly average | report only (mg/L) | all year |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year |
| Solids, total dissolved | monthly average | report only (lb/d) | all year |
| Solids, total dissolved | daily maximum | report only (lb/d) | all year |
Cited limits by parameter: Arkansas's rules and the federal ones.
Same industry: the 30 Mining and Quarrying of Nonmetallic Minerals permits in Arkansas.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/AR0043354 · MCP: https://passage-data.com/mcp