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Sewage treatment plant, Elk Run Heights, Iowa. NPDES permit IA0034231, in force until Oct 31, 2028. Last 12 months: over a limit 3 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 64 | ≤ 40 mg/L | 60% |
| March 2026 | pH, daily maximum | 9.13 | ≤ 9 SU | — |
| April 2026 | pH, daily maximum | 10.31 | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.4 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 | ≥ 6.4 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 | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 125 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 188 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, total [as N] | 30-day average | ≤ 66.7 lb/d | all year |
| Nitrogen, total [as N] | daily maximum | ≤ 109.2 lb/d | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.8 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.7 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.6 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.9 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.2 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.4 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.7 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.1 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.9 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.8 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 40.1 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 40.8 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.7 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.6 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.8 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.9 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.1 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.6 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 63.6 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65.7 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 61.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65.5 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 69.9 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 70.9 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 67.5 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 68.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 63.1 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 75.7 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 67.5 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 62.3 lb/d | Jun |
| E. coli | 30-day average | ≤ 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 | ≤ 104 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 167 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/IA0034231 · MCP: https://passage-data.com/mcp