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Sewage treatment plant, major discharger, Cresco, Iowa. NPDES permit IA0021334 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 6 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Copper, total [as Cu], 30-day average | .03 | ≤ .01718 mg/L | 75% |
| November 2025 | Copper, total [as Cu], daily maximum | .03 | ≤ .02695 mg/L | 11% |
| December 2025 | Copper, total [as Cu], 30-day average | .02 | ≤ .01718 mg/L | 16% |
| February 2026 | Copper, total [as Cu], 30-day average | .02 | ≤ .01718 mg/L | 16% |
| April 2026 | Nitrogen, ammonia total [as N], 30-day average | 37.23867 | ≤ 31.8 lb/d | 17% |
| April 2026 | Nitrogen, ammonia total [as N], 30-day average | 4.32875 | ≤ 1.7 mg/L | 155% |
| 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 | ≤ 609 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 914 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 | ≤ 1.1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.8 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.8 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.2 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.3 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.7 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 20.9 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 36.2 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19.9 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 32.4 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 82.4 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 48.4 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 31.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 71 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27.3 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 71 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 51.6 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 264 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 308.7 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 256.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 319.2 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 288.8 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 298.6 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 319.2 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 298.6 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 293.6 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 308.8 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 324.5 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 304.8 lb/d | Sep |
| 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 | ≤ .01718 mg/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ .02695 mg/L | all year |
| Copper, total [as Cu] | 30-day average | ≤ .3442 lb/d | all year |
| Copper, total [as Cu] | daily maximum | ≤ .5467 lb/d | all year |
| E. coli | geometric mean | ≤ 126 #/100mL | all year |
| 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 | ≤ 508 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 813 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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