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Sewage treatment plant, Everly, Iowa. NPDES permit IA0028916, in force until Dec 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 2.7 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 | ≤ 196 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 295 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 | ≤ 7.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.3 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.8 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.8 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.1 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.3 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.8 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.8 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.6 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.1 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25.3 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.4 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.7 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 17.9 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.1 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29.6 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.9 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25.3 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29.8 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.9 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30.6 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.9 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.6 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29.6 lb/d | Sep |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year |
| Chloride [as Cl] | 30-day average | report only (lb/d) | all year |
| Chloride [as Cl] | daily maximum | report only (lb/d) | all year |
| 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 | ≤ 164 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 262 lb/d | all year |
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/IA0028916 · MCP: https://passage-data.com/mcp