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Chicken Eggs, Guthrie Center, Iowa. NPDES permit IA0075361 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 15 times (last August 2026), 4 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrogen, ammonia total [as N], daily maximum | 6.1 | ≤ 3.8 mg/L | 61% |
| May 2026 | Solids, total suspended, 30-day average | 42.06028 | ≤ 30 lb/d | 40% |
| May 2026 | Solids, total suspended, 7-day average | 57.44175 | ≤ 45 lb/d | 28% |
| June 2026 | Nitrogen, ammonia total [as N], 30-day average | 3.4611 | ≤ 3.2 lb/d | 8% |
| June 2026 | Nitrogen, ammonia total [as N], daily maximum | 7.0473 | ≤ 4.1 lb/d | 72% |
| June 2026 | Solids, total suspended, 30-day average | 62.16821 | ≤ 30 lb/d | 107% |
| June 2026 | Solids, total suspended, 7-day average | 91.1562 | ≤ 45 lb/d | 103% |
| July 2026 | Nitrogen, ammonia total [as N], 30-day average | 3.3499 | ≤ 2.8 lb/d | 20% |
| July 2026 | Nitrogen, ammonia total [as N], daily maximum | 4.1283 | ≤ 4.1 lb/d | 1% |
| July 2026 | Solids, total suspended, 30-day average | 101.4755 | ≤ 30 lb/d | 238% |
| July 2026 | Solids, total suspended, 7-day average | 134.8077 | ≤ 45 lb/d | 200% |
| August 2026 | Nitrogen, ammonia total [as N], 30-day average | 3.283875 | ≤ 2.7 lb/d | 22% |
| August 2026 | Nitrogen, ammonia total [as N], daily maximum | 4.1283 | ≤ 3.4 lb/d | 21% |
| August 2026 | Solids, total suspended, 30-day average | 75.74596 | ≤ 30 lb/d | 152% |
| August 2026 | Solids, total suspended, 7-day average | 106.5852 | ≤ 45 lb/d | 137% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 lb/d | all year |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 lb/d | 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 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 412 mg/L | all year |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 412 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 | ≤ 30 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 45 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 | ≤ 3.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.2 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.3 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.3 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.7 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.2 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.3 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.1 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.3 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 lb/d | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.7 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.2 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.6 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.4 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.5 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.3 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.1 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.1 lb/d | Jan |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | ≤ 703 lb/d | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | ≤ 1151 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 |
Cited limits by parameter: Iowa's rules and the federal ones.
Same industry: the 4 Agricultural Production — Livestock and Animal Specialties permits in Iowa.
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