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Industrial Organic Chemicals, Steamboat Rock, Iowa. NPDES permit IA0079138, in force until Sep 30, 2027. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 37.5 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 56.3 lb/d | all year |
| Sulfate, total [as SO4] | 30-day average | ≤ 1514 mg/L | all year |
| Sulfate, total [as SO4] | daily maximum | ≤ 1514 mg/L | all year |
| Sulfate, total [as SO4] | 30-day average | ≤ 1894 lb/d | all year |
| Sulfate, total [as SO4] | daily maximum | ≤ 1894 lb/d | all year |
| Iron, total [as Fe] | 30-day average | ≤ 1 mg/L | all year |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year |
| Iron, total [as Fe] | 30-day average | ≤ 1.25 lb/d | all year |
| Iron, total [as Fe] | daily maximum | ≤ 1.25 lb/d | all year |
| Chlorine, total residual | 30-day average | ≤ .053 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .053 mg/L | all year |
| Chlorine, total residual | 30-day average | ≤ .066 lb/d | all year |
| Chlorine, total residual | daily maximum | ≤ .066 lb/d | all year |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 57 Chemicals and Allied Products 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/IA0079138 · MCP: https://passage-data.com/mcp