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Sewage treatment plant, major discharger, Tipton, Iowa. NPDES permit IA0032727, in force until May 31, 2028. Last 12 months: over a limit once (last December 2025), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, ammonia total [as N], 30-day average | 3.747 | ≤ 2.5 mg/L | 50% |
| 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 | ≤ 363 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 544 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 | ≤ 1.6 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 mg/L | Sep |
| 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 | ≤ 1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 41.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.5 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 28.1 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29.9 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.4 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 21 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.8 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.8 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 41.2 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.2 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 101.7 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 69.3 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 101.7 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 101.7 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 101.7 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 101.7 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 84 lb/d | Jul |
| 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 |
| 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 | ≤ 420 #/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 | ≤ 302 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 484 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
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