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Sewage treatment plant, Elgin, Iowa. NPDES permit IA0024414, in force until Mar 31, 2027. Last 12 months: no values over a limit, 3 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| 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 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| pH | 30-day average | report only (SU) | all year |
| pH | daily maximum | report only (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 | ≤ 243 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 364 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 | ≤ 35.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 67.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 34.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 31 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 28.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 64.4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 34.5 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 42.7 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 67.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 64.4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34.5 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 42.7 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.4 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 84.4 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 23.4 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.8 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 53.2 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.4 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 26.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 31.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.4 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84.4 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23.4 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.8 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 53.2 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.4 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31.2 lb/d | Mar |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov |
| E. coli | geometric mean | ≤ 1415 #/100mL | Jan, Feb, Dec |
| 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 | ≤ 76 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 121 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
Your permit document is the final word. As JSON: /api/v1/permits/IA0024414 · MCP: https://passage-data.com/mcp