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Sewage treatment plant, major discharger, Cascade, Iowa. NPDES permit IA0027740, in force until Apr 30, 2028. Last 12 months: no values over a limit. 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 | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 312 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 469 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 | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 21.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 21.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.1 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.6 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.4 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.2 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.2 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.2 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 85.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 52.7 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 113.8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 53.4 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 59.2 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 131.1 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 139.5 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 178.2 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 80.1 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 56.3 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 87.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 185.5 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 185.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 173.9 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 179.5 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 193.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 195 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 174.1 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 188.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 178.2 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 182.3 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 210 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 185.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 185.5 lb/d | Jan |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | all year |
| 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 | ≤ 260 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 417 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/IA0027740 · MCP: https://passage-data.com/mcp