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Sewerage Systems, Lead, South Dakota. NPDES permit SD0028615, in force until Dec 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | 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 | report only (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 | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 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 | ≤ 2.6 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.3 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.8 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.1 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.6 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.5 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.6 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.4 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31.5 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.3 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.9 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.9 mg/L | Jun |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| 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 |
| Flow, total | monthly total | report only (Mgal) | all year |
| 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/SD0028615 · MCP: https://passage-data.com/mcp