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Nitrogenous Fertilizers, major discharger, Sergeant Bluff, Iowa. NPDES permit IA0004014, in force until Jan 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Oil & Grease | 30-day average | ≤ 10 mg/L | all year |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year |
| Oil & Grease | 30-day average | ≤ 456 lb/d | all year |
| Oil & Grease | daily maximum | ≤ 685 lb/d | all year |
| Nitrogen, organic total [as N] | 30-day average | ≤ 4441 lb/d | all year |
| Nitrogen, organic total [as N] | daily maximum | ≤ 8306 lb/d | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 166.6 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 154.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 91.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 91.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 92.4 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 111.3 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 133.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 93.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 111.5 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 111 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 91.6 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 111.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 166.6 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 154.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 91.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 91.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 92.4 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 111.3 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 133.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 93.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 111.5 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 111 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 91.6 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 111.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3344 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6587 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6587 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4292 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4292 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4364 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4189 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6220 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4271 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4497 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3705 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4160 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4189 lb/d | Jun |
| Nitrogen, nitrate total [as N] | 30-day average | ≤ 206 lb/d | all year |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 594 lb/d | all year |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | 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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Your permit document is the final word. As JSON: /api/v1/permits/IA0004014 · MCP: https://passage-data.com/mcp