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Sewage treatment plant, major discharger, Pella, Iowa. NPDES permit IA0043869, in force until Mar 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| 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 | ≥ 6.5 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 | ≤ 1078 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 1618 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, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.6 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.3 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.2 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 142 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 62.5 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 55.9 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 36.1 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 122.4 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 88.9 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 34.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 122.4 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 83.4 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 54.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 38 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 510.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 546 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 564.4 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 542.8 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 527.9 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 573.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 521.2 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 519.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 546 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 527.9 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 564.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 592.8 lb/d | Sep |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (lb/d) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| E. coli | geometric mean | ≤ 186 #/100mL | Mar–Nov |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 N=0;Y=1 | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1 N=0;Y=1 | 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 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 899 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 1438 lb/d | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Copper, total [as Cu], 30-day average | 0.8476 lb/d | new | — | — |
| Copper, total [as Cu], 30-day average | 0.02358 mg/L | new | — | — |
| Copper, total [as Cu], daily maximum | 1.026 lb/d | new | — | — |
| Copper, total [as Cu], daily maximum | 0.02854 mg/L | new | — | — |
| Cyanide, total [as CN], 30-day average | 0.0052 mg/L | new | — | — |
| Cyanide, total [as CN], 30-day average | 0.1869 lb/d | new | — | — |
| Cyanide, total [as CN], daily maximum | 0.7908 lb/d | new | — | — |
| Cyanide, total [as CN], daily maximum | 0.022 mg/L | new | — | — |
| Phenols, 30-day average | 1.797 lb/d | new | — | — |
| Phenols, 30-day average | 0.05 mg/L | new | — | — |
| Phenols, daily maximum | 89.86 lb/d | new | — | — |
| Phenols, daily maximum | 2.5 mg/L | new | — | — |
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/IA0043869 · MCP: https://passage-data.com/mcp