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Sewage treatment plant, Truesdale, Iowa. NPDES permit IA0079782 expired Mar 2, 2013; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 2.3 lb/d | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 3.4 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.5 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.5 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Jul | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Nov | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Aug | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Mar | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | May | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Oct | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Apr | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 lb/d | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 lb/d | Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .4 lb/d | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .8 lb/d | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .6 lb/d | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 lb/d | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .6 lb/d | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 lb/d | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 lb/d | Jun | 002 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 1.9 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 3 lb/d | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 2.3 lb/d | all year | 003 |
| Solids, total suspended | 7-day average | ≤ 3.4 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.3 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.6 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.3 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.5 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .5 lb/d | Feb | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .4 lb/d | Jan | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .3 lb/d | Dec | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (lb/d) | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.1 lb/d | Feb | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .9 lb/d | Jan | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .6 lb/d | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Aug | 003 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 1.9 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 3 lb/d | all year | 003 |
Cited limits by parameter: Iowa's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/IA0079782 · MCP: https://passage-data.com/mcp