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Sewage treatment plant, Lower Brule, South Dakota. NPDES permit SD0020800, in force until Dec 31, 2026. Last 12 months: no values over a limit, 6 required values missing, 5 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ 11 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 19 ug/L | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 410 #/100mL | all year | 001 |
| Flow | 30-day average | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 65 % | all year | 001 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | I001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | I001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | I001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | I001 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | R001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | R001 |
| pH | minimum | report only (SU) | all year | R001 |
| pH | maximum | report only (SU) | all year | R001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | R001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | R001 |
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/SD0020800 · MCP: https://passage-data.com/mcp