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Sewage treatment plant, major discharger, Emmetsburg, Iowa. NPDES permit IA0021580, in force until Apr 30, 2031. Last 12 months: over a limit 27 times (last September 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Chloride [as Cl], 30-day average | 889.75 | ≤ 429 mg/L | 107% |
| October 2025 | Chloride [as Cl], daily maximum | 929 | ≤ 703 mg/L | 32% |
| October 2025 | Oxygen, dissolved [DO], daily minimum | 5.96 | ≥ 6 mg/L | 1% |
| November 2025 | Chloride [as Cl], 30-day average | 789.25 | ≤ 429 mg/L | 84% |
| November 2025 | Chloride [as Cl], daily maximum | 979 | ≤ 703 mg/L | 39% |
| December 2025 | Chloride [as Cl], 30-day average | 1025 | ≤ 429 mg/L | 139% |
| December 2025 | Chloride [as Cl], daily maximum | 1150 | ≤ 703 mg/L | 64% |
| January 2026 | Chloride [as Cl], 30-day average | 756.25 | ≤ 429 mg/L | 76% |
| January 2026 | Chloride [as Cl], daily maximum | 807 | ≤ 703 mg/L | 15% |
| February 2026 | Chloride [as Cl], 30-day average | 824.25 | ≤ 429 mg/L | 92% |
| February 2026 | Chloride [as Cl], daily maximum | 847 | ≤ 703 mg/L | 20% |
| March 2026 | Chloride [as Cl], 30-day average | 638.4 | ≤ 429 mg/L | 49% |
| March 2026 | Chloride [as Cl], daily maximum | 857 | ≤ 703 mg/L | 22% |
| April 2026 | Chloride [as Cl], 30-day average | 467.5 | ≤ 429 mg/L | 9% |
| May 2026 | Chloride [as Cl], 30-day average | 682.25 | ≤ 429 mg/L | 59% |
| May 2026 | Chloride [as Cl], daily maximum | 830 | ≤ 703 mg/L | 18% |
| June 2026 | Chloride [as Cl], 30-day average | 830 | ≤ 429 mg/L | 93% |
| June 2026 | Chloride [as Cl], daily maximum | 934 | ≤ 703 mg/L | 33% |
| July 2026 | Chloride [as Cl], 30-day average | 883 | ≤ 429 mg/L | 106% |
| July 2026 | Chloride [as Cl], daily maximum | 1060 | ≤ 703 mg/L | 51% |
| July 2026 | Oxygen, dissolved [DO], daily minimum | 5.39 | ≥ 6 mg/L | 10% |
| August 2026 | Chloride [as Cl], 30-day average | 1002.2 | ≤ 429 mg/L | 134% |
| August 2026 | Chloride [as Cl], daily maximum | 1040 | ≤ 703 mg/L | 48% |
| August 2026 | Oxygen, dissolved [DO], daily minimum | 5.73 | ≥ 6 mg/L | 5% |
| September 2026 | Chloride [as Cl], 30-day average | 730.25 | ≤ 429 mg/L | 70% |
| September 2026 | Chloride [as Cl], daily maximum | 891 | ≤ 703 mg/L | 27% |
| September 2026 | Oxygen, dissolved [DO], daily minimum | 5.39 | ≥ 6 mg/L | 10% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 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 | ≤ 375 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 563 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 | ≤ 3.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.8 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.3 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.2 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.8 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.5 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.5 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.5 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.6 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.2 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.3 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 42.6 lb/d | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 49.4 lb/d | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22.9 lb/d | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 26.2 lb/d | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 35.1 lb/d | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16.8 lb/d | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.3 lb/d | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 64.6 lb/d | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 56.8 lb/d | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.5 lb/d | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 72.7 lb/d | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18.6 lb/d | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 85.1 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 118.8 lb/d | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 66.3 lb/d | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 93.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 60 lb/d | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 47.5 lb/d | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35 lb/d | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 142.6 lb/d | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 132.6 lb/d | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36.3 lb/d | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 160.1 lb/d | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 43.8 lb/d | Sep |
| Nitrogen, nitrate total [as N] | 30-day average | ≤ 399 lb/d | all year |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 653 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 |
| Chloride [as Cl] | 30-day average | ≤ 429 mg/L | all year |
| Chloride [as Cl] | daily maximum | ≤ 703 mg/L | all year |
| Chloride [as Cl] | 30-day average | ≤ 5366 lb/d | all year |
| Chloride [as Cl] | daily maximum | ≤ 8796 lb/d | all year |
| E. coli | geometric mean | ≤ 126 #/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 | ≤ 313 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 500 lb/d | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Nitrogen, ammonia total [as N], 30-day average | 11.9 lb/d (Aug) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.1 mg/L (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 13.2 lb/d (Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 19.5 lb/d (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.6 mg/L (Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 42.6 lb/d (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 3.4 mg/L (Jan) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1.5 mg/L (Apr) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 19.1 lb/d (Apr) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 31 lb/d (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.5 mg/L (Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 49.4 lb/d (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 4 mg/L (Feb) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 16.4 lb/d (Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 12.6 lb/d (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 1 mg/L (Jul) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 21.7 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 | 3.4 mg/L (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 42.6 lb/d (Mar) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 29 lb/d (Nov) | tighter | — | — |
| Nitrogen, ammonia total [as N], 30-day average | 2.3 mg/L (Nov) | tighter | — | — |
Cited limits by parameter: Iowa's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IA0021580 · MCP: https://passage-data.com/mcp