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Sewage treatment plant, Brooklyn, Iowa. NPDES permit IA0020958, in force until Aug 31, 2028. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 4.6 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 | ≤ 157 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 236 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 | ≤ 3.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.4 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.6 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.5 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.7 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.9 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.8 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.2 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.2 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.4 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.8 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.1 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.1 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.6 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 31.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 26.8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.4 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.3 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 83.4 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 86.9 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 87.8 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 89.1 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 92.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 83.4 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 82.8 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 100.4 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 93.6 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 89.1 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 90.6 lb/d | Dec |
| E. coli | geometric mean | ≤ 630 #/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 | ≤ 131 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 210 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/IA0020958 · MCP: https://passage-data.com/mcp