Passage Data · Check a report · Use it from your AI
Sewage treatment plant, Spillville, Iowa. NPDES permit IA0042749, in force until Jun 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 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 |
| 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 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| E. coli, geometric mean | 127 #/100mL (Mar–Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.8 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 21.8 lb/d (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 44.3 lb/d (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 32.9 lb/d (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 11.9 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 8.8 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 21 lb/d (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.6 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 30.7 lb/d (May) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 8.2 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 30.8 lb/d (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 8.3 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.1 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 19 lb/d (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 25.3 lb/d (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 6.8 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 81.2 lb/d (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 21.8 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.6 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 17.3 lb/d (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.6 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 17.3 lb/d (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4.6 mg/L (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 17.3 lb/d (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 21.8 lb/d (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 44.3 lb/d (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 11.9 mg/L (Feb) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.8 mg/L (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 5.8 mg/L (Dec) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 32.9 lb/d (Apr) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 21 lb/d (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 5.6 mg/L (Jul) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 30.7 lb/d (May) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.2 mg/L (May) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 30.8 lb/d (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.3 mg/L (Jun) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 5.1 mg/L (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 19 lb/d (Aug) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 6.8 mg/L (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 25.3 lb/d (Mar) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 23.8 mg/L (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 88.8 lb/d (Jan) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.6 mg/L (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 17.3 lb/d (Oct) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.6 mg/L (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 17.3 lb/d (Nov) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 17.3 lb/d (Sep) | new | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.6 mg/L (Sep) | new | — | — |
Cited limits by parameter: Iowa's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IA0042749 · MCP: https://passage-data.com/mcp