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Sewage treatment plant, Tracy, Iowa. NPDES permit IA0081647 expired Aug 31, 2026; its limits still apply. 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 |
| Solids, total suspended | 30-day average | ≤ 80 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.9 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.9 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.9 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.3 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.4 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.8 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.3 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 42.3 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.8 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.9 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.8 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 lb/d | Mar |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Aug |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Jan |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | May |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Nov |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Mar |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Dec |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Sep |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Apr |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Jul |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Feb |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 27 mg/L | Aug |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Jan |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Jun |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | May |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Nov |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Mar |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 27 mg/L | Sep |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Apr |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 27 mg/L | Jul |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Feb |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Oct |
Cited limits by parameter: Iowa's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IA0081647 · MCP: https://passage-data.com/mcp