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Asphalt Paving Mixtures And Blocks, Sioux City, Iowa. NPDES permit IA0079944 expired Dec 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 23 mg/L | all year | 001 |
| Oil & Grease | 30-day average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 23 mg/L | all year | 003 |
| Oil & Grease | 30-day average | ≤ 10 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 3 Petroleum Refining and Related Industries permits in Iowa.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IA0079944 · MCP: https://passage-data.com/mcp