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Sewage treatment plant, Lovilia, Iowa. NPDES permit IA0027430, in force until Sep 30, 2028. Last 12 months: no values over a limit, 1 of 11 reports late. 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 | ≤ 80 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 121 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 182 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 | ≤ 13.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.1 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 131.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 547.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 52.2 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 41.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25.2 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 51.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.9 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 131.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 547.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 52.2 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25.2 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 51.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 199 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 462 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 79 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 17 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 62 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 38 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 78 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 199 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 462 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 79 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 62 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 38 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 78 lb/d | Mar |
| 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 | ≤ 38 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 61 lb/d | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Nitrogen, ammonia total [as N], 30-day average | 1.4 lb/d (Aug) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1 mg/L (Aug) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4 mg/L (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.2 lb/d (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.6 lb/d (May) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.7 mg/L (May) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 6 lb/d (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.4 mg/L (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.5 mg/L (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.8 lb/d (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1 mg/L (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.5 lb/d (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.6 lb/d (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.1 mg/L (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.3 mg/L (Nov) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.5 lb/d (Nov) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.6 mg/L (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.4 lb/d (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.4 mg/L (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 5.2 lb/d (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.3 mg/L (Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2 lb/d (Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.5 mg/L (Apr) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.3 lb/d (Apr) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Aug) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 lb/d (Aug) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 5.9 lb/d (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.9 mg/L (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.9 lb/d (May) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 5.9 lb/d (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (May) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.9 mg/L (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 12.8 lb/d (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 8.4 mg/L (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.9 lb/d (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 lb/d (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Nov) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 lb/d (Nov) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4 lb/d (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 2.7 mg/L (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 30.2 lb/d (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 19.9 mg/L (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.9 lb/d (Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 3.2 mg/L (Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 4.7 mg/L (Apr) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 7.2 lb/d (Apr) | tighter | — | — |
Cited limits by parameter: Iowa's rules and the federal ones.
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