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Sewage treatment plant, Saint Anthony, Iowa. NPDES permit IA0077291, in force until Jul 31, 2030. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, ammonia total [as N], 30-day average | 7.75 | ≤ 3.9 mg/L | 99% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 7.75 | ≤ 4 mg/L | 94% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6.5 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 | ≤ 1.7 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.6 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.4 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.9 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.6 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.6 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.6 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.4 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.1 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.9 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.1 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.6 lb/d | Aug |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year |
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/IA0077291 · MCP: https://passage-data.com/mcp