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Sewage treatment plant, major discharger, Monticello, Iowa. NPDES permit IA0026034, in force until Dec 31, 2027. Last 12 months: over a limit 5 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Solids, total suspended, 7-day average | 52 | ≤ 45 mg/L | 16% |
| February 2026 | Solids, total suspended, 30-day average | 300.4068 | ≤ 285 lb/d | 5% |
| February 2026 | Solids, total suspended, 30-day average | 72 | ≤ 30 mg/L | 140% |
| February 2026 | Solids, total suspended, 7-day average | 189 | ≤ 45 mg/L | 320% |
| February 2026 | Solids, total suspended, 7-day average | 843.2991 | ≤ 428 lb/d | 97% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| 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 | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 285 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 428 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 | ≤ 19.2 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14.9 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.9 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 17.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.2 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.9 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.2 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.1 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 126.1 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 159 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 157.1 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 76.8 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 164.4 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 94.3 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 155.2 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 81 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 122.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 168.3 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 85.2 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 140.4 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 165.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 159 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 157.1 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 172.8 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 164.4 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 154.5 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 155.2 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 186.9 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 165.6 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 168.3 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 173.8 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 162.1 lb/d | May |
| 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 |
| Copper, total [as Cu] | 30-day average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | 30-day average | report only (lb/d) | all year |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year |
| E. coli | geometric mean | ≤ 126 #/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 | ≤ 238 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 380 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/IA0026034 · MCP: https://passage-data.com/mcp