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Sewage treatment plant, major discharger, Davenport, Iowa. NPDES permit IA0043052 expired Jun 30, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | 30-day average | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 10008 lb/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 15012 lb/d | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 84.2 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 55.8 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 66 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 63.5 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 57.6 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 58.5 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 57.2 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 72.8 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 57.3 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 68.1 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 74.3 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 64.4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84.2 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 55.8 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 66 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 63.5 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 57.6 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 58.5 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 57.2 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 72.8 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 57.3 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 68.1 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 74.3 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 64.4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18263 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12093.6 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14318 lb/d | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13765.7 lb/d | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12483.1 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12676.9 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12398.1 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15777.1 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12416.1 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14766.4 lb/d | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16104.2 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13974.2 lb/d | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18263 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12093.6 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14318 lb/d | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13765.7 lb/d | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12483.1 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13676.9 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12398.1 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15777.1 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12416.1 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14766.4 lb/d | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16104.2 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13974.2 lb/d | May | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 8340 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 13344 lb/d | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 015 |
| pH | daily maximum | ≤ 9 SU | all year | 015 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | SUM |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | SUM |
| Solids, total suspended | 30-day average | ≤ 10008 lb/d | all year | SUM |
| Solids, total suspended | 7-day average | ≤ 15012 lb/d | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 8340 lb/d | all year | SUM |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 13344 lb/d | all year | SUM |
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/IA0043052 · MCP: https://passage-data.com/mcp