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Sewage treatment plant, New Vienna, Iowa. NPDES permit IA0027391, in force until Apr 30, 2027. Last 12 months: over a limit 2 times (last February 2026), 35 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 34 | ≤ 31 mg/L | 10% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 34 | ≤ 31 mg/L | 10% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ .4 mg/L | all year |
| 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 |
| Solids, total suspended | 30-day average | ≤ 56 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 84 lb/d | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.7 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 41.6 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.7 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 17.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.4 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 31 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.7 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.4 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41.6 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.8 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.2 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.4 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.7 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.3 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.9 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.3 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.2 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.5 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.5 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.7 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.7 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.5 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.6 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.7 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.3 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.5 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.5 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.3 lb/d | Feb |
| Phosphorus, total [as P] | 30-day average | ≤ 2.69 lb/d | all year |
| Phosphorus, total [as P] | daily maximum | ≤ 2.69 lb/d | all year |
| Chlorine, total residual | 30-day average | ≤ .07 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .07 mg/L | all year |
| Chlorine, total residual | 30-day average | ≤ .028 lb/d | all year |
| Chlorine, total residual | daily maximum | ≤ .028 lb/d | all year |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov |
| 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 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 18 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 28 lb/d | all year |
Cited limits by parameter: Iowa's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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