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Sewage treatment plant, Fayette, Iowa. NPDES permit IA0027456, in force until Aug 31, 2030. Last 12 months: no values over a limit, 3 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | 30-day average | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 80 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 292 lb/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 438 lb/d | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.4 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.2 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.2 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 28.4 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.5 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.4 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.2 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.2 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.2 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28.4 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.5 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.4 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16 lb/d | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 17.7 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 lb/d | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.2 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.1 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.6 lb/d | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 45.3 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.4 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 36.9 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.4 lb/d | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 lb/d | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 lb/d | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.7 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 lb/d | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.7 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14 lb/d | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 79.9 lb/d | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.4 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36.9 lb/d | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 lb/d | Jun | 001 |
| Chlorine, total residual | 30-day average | ≤ .037 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .037 mg/L | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .084 lb/d | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .084 lb/d | all year | 001 |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 91 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 146 lb/d | all year | 001 |
| pH | daily minimum | ≥ 6.1 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 80 mg/L | all year | 003 |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 394 lb/d | all year | 003 |
| Solids, total suspended | 7-day average | ≤ 591 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.3 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.8 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | Oct | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | Sep | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11.4 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.4 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.4 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | Nov | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.4 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.3 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.3 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.6 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.3 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.8 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.4 mg/L | Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.4 mg/L | Sep | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.4 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23.3 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.4 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.4 mg/L | Nov | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.4 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.3 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.3 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14.5 lb/d | Jul | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.8 lb/d | Aug | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.6 lb/d | Oct | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.3 lb/d | Sep | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47.6 lb/d | Feb | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 49.7 lb/d | Jan | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24.3 lb/d | Mar | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.6 lb/d | Nov | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 lb/d | Apr | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.1 lb/d | Jun | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.1 lb/d | May | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.6 lb/d | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | Jul | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.4 lb/d | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Sep | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 47.6 lb/d | Feb | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 105.4 lb/d | Jan | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.3 lb/d | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Nov | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26.7 lb/d | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | Jun | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | May | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.6 lb/d | Dec | 003 |
| Chlorine, total residual | 30-day average | ≤ .026 mg/L | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ .026 mg/L | all year | 003 |
| Chlorine, total residual | 30-day average | ≤ .108 lb/d | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ .108 lb/d | all year | 003 |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | 003 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 123 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 197 lb/d | all year | 003 |
| pH | daily minimum | ≥ 6.1 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | 30-day average | ≤ 80 mg/L | all year | 004 |
| Solids, total suspended | 7-day average | ≤ 120 mg/L | all year | 004 |
| Solids, total suspended | 30-day average | ≤ 394 lb/d | all year | 004 |
| Solids, total suspended | 7-day average | ≤ 591 lb/d | all year | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | May | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.6 mg/L | Dec | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.9 mg/L | Mar | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Nov | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Sep | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.1 mg/L | Jan | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.7 mg/L | Feb | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Jun | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.9 mg/L | Jul | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 mg/L | Apr | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | Aug | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | May | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Oct | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.6 mg/L | Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.9 mg/L | Mar | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Nov | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Sep | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.4 mg/L | Jan | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.7 mg/L | Feb | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Jun | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Jul | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.4 mg/L | Apr | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.5 mg/L | Aug | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.1 lb/d | May | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.6 lb/d | Oct | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.6 lb/d | Dec | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24.3 lb/d | Mar | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.6 lb/d | Nov | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.3 lb/d | Sep | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 49.7 lb/d | Jan | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 47.6 lb/d | Feb | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.1 lb/d | Jun | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14.5 lb/d | Jul | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 lb/d | Apr | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.8 lb/d | Aug | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | May | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Oct | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22.6 lb/d | Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24.3 lb/d | Mar | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Nov | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.6 lb/d | Sep | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 105.4 lb/d | Jan | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 47.6 lb/d | Feb | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | Jun | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.1 lb/d | Jul | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26.7 lb/d | Apr | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.4 lb/d | Aug | 004 |
| Chlorine, total residual | 30-day average | ≤ .022 mg/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ .022 mg/L | all year | 004 |
| Chlorine, total residual | 30-day average | ≤ .108 lb/d | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ .108 lb/d | all year | 004 |
| E. coli | geometric mean | ≤ 126 #/100mL | Mar–Nov | 004 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 123 lb/d | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 197 lb/d | all year | 004 |
Cited limits by parameter: Iowa's rules and the federal ones.
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