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Ready-Mixed Concrete, Marion, Indiana. NPDES permit INRM02409 expired Aug 26, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | maximum | report only (SU) | Aug |
| Solids, total suspended | maximum | report only (mg/L) | Aug |
| Oil and grease, hexane extr method | maximum | report only (mg/L) | Aug |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (mg/L) | Aug |
| Nitrite + Nitrate total [as N] | maximum | report only (mg/L) | Aug |
| Phosphorus, total [as P] | maximum | report only (mg/L) | Aug |
| BOD, carbonaceous [5 day, 20 C] | maximum | report only (mg/L) | Aug |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | Aug |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 80 Stone, Clay, Glass and Concrete Products permits in Indiana.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/INRM02409 · MCP: https://passage-data.com/mcp