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Sewage treatment plant, Cambridge, Iowa. NPDES permit IA0022101, in force until Mar 31, 2028. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | E. coli, geometric mean | 239.2014 | ≤ 126 #/100mL | 90% |
| 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 | ≤ 307 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 460 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 | ≤ 86.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 46 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 109.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 116.2 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 125.4 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 259.7 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 167.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 62.1 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 257.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 48.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 78.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 140.3 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 89.1 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 47.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 237 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 304.1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 400.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 308.6 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 167.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 95.8 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 267.1 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 59.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 88.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 332.7 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 176.6 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 183.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 418.5 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 445.6 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 481 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 996.5 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 641.6 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 238.3 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 987 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 185.1 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 300.4 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 538.3 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 341.7 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 183.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 909.3 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1166.6 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1537.7 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1183.9 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 641.6 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 367.6 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1024.7 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 226.6 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 338.6 lb/d | Nov |
| 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 | ≤ 96 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 153 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/IA0022101 · MCP: https://passage-data.com/mcp