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Federal facility (National Security), Johnston, Iowa. NPDES permit IA0063215, in force until Aug 31, 2030. Last 12 months: over a limit once (last April 2026), 8 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| April 2026 | pH, daily maximum | 9.22 | ≤ 9 SU |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 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 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 | ≤ 80 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 264 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 396 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 | ≤ 51.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.3 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.9 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.3 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.9 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 21.8 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.1 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 51.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.3 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.8 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 170.2 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.7 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.4 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.4 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.7 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 33.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.7 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 72 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 33.2 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 40.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 170.2 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.7 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.4 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.4 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.7 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.4 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.7 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 72 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33.2 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40.4 lb/d | Apr |
| Nitrogen, nitrate total [as N] | 30-day average | ≤ 48 lb/d | all year |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 78 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 | ≤ 83 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 132 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/IA0063215 · MCP: https://passage-data.com/mcp