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Sewage treatment plant, major discharger, Boone, Iowa. NPDES permit IA0058076, in force until Nov 30, 2029. 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 | ≤ 1751 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 2627 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, 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 | ≤ 3.5 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.8 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.6 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.5 mg/L | Sep |
| 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 | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.2 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.6 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.2 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 62.2 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 77.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 200.6 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 176 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 145.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 102.4 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 59.2 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 91.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 56.2 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 89.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 232.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 136.7 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 962.8 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 843.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 886.7 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 857.4 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 931.9 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 886.7 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1026.5 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 916.6 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 947.2 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 916.6 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 828.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 857.4 lb/d | Nov |
| Nitrogen, nitrate total [as N] | 30-day average | ≤ 657 lb/d | all year |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 1075 lb/d | all year |
| 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 |
| E. coli | geometric mean | ≤ 151 #/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 | ≤ 1460 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 2335 lb/d | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Cyanide, total [as CN], 30-day average | 0.00524 mg/L | new | — | — |
| Cyanide, total [as CN], 30-day average | 0.3043 lb/d | new | — | — |
| Cyanide, total [as CN], daily maximum | 1.285 lb/d | new | — | — |
| Cyanide, total [as CN], daily maximum | 0.02202 mg/L | new | — | — |
| Lead, total [as Pb], 30-day average | 0.4501 lb/d | new | — | — |
| Lead, total [as Pb], 30-day average | 0.007752 mg/L | new | — | — |
| Lead, total [as Pb], daily maximum | 0.1976 mg/L | new | — | — |
| Lead, total [as Pb], daily maximum | 11.53 lb/d | new | — | — |
| Phenols, 30-day average | 2.926 lb/d | new | — | — |
| Phenols, 30-day average | 0.05038 mg/L | new | — | — |
| Phenols, daily maximum | 2.502 mg/L | new | — | — |
| Phenols, daily maximum | 146 lb/d | new | — | — |
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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