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Sewage treatment plant, Summerset, South Dakota. NPDES permit SD0027758, in force until Apr 30, 2031. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | 30-day average | report only (deg F) | all year |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year |
| Flow rate | 30-day average | report only (MGD) | all year |
| Flow rate | daily maximum | report only (MGD) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 17.5 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6.6 SU | all year |
| pH | daily maximum | ≤ 8.6 SU | all year |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 17.5 mg/L | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.3 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.7 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.4 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.2 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.3 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.3 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.1 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.8 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.3 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.3 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.5 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.3 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.2 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.6 mg/L | Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 126 #/100mL | May–Sep |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 #/100mL | May–Sep |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
Cited limits by parameter: South Dakota'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/SD0027758 · MCP: https://passage-data.com/mcp