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Sewage treatment plant, Galva, Iowa. NPDES permit IA0056537 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last July 2026), 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | BOD, carbonaceous [5 day, 20 C], 30-day average | 28.89 | ≤ 25 mg/L | 16% |
| July 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 43.8 | ≤ 40 mg/L | 10% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 4.2 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year |
| pH | daily minimum | ≥ 6.3 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 19 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 28 lb/d | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | 30-day average | report only (lb/d) | all year |
| Solids, total suspended | daily maximum | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.6 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.7 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.9 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.3 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.1 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.9 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.9 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.3 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.3 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.2 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.9 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.2 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.2 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.3 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.6 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.6 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.3 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.3 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.9 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.9 lb/d | Oct |
| E. coli | geometric mean | ≤ 276 #/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 | ≤ 15 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 24 lb/d | all year |
Cited limits by parameter: Iowa's rules and the federal ones.
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