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Sewage treatment plant, Lead, South Dakota. NPDES permit SD0027481 expired Jun 30, 2017; its limits still apply. Last 12 months: no values over a limit, 6 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004 |
| Flow rate | daily maximum | report only (MGD) | all year | 004 |
| Rainfall duration | monthly total | report only (hr/mo) | all year | 004 |
| Rainfall duration | daily maximum | report only (hr/mo) | all year | 004 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 004 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 004 |
| pH | daily minimum | report only (SU) | all year | 004 |
| pH | daily maximum | report only (SU) | all year | 004 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Floating solids, waste or visible foam-visual | daily maximum | report only (N=0;Y=1) | all year | 004 |
| Rainfall | monthly total | report only (in) | all year | 004 |
| Rainfall | daily maximum | report only (in) | all year | 004 |
| E. coli, colony forming units [CFU] | 30-day geometric mean | report only (#/100mL) | all year | 004 |
| E. coli, colony forming units [CFU] | daily maximum | report only (#/100mL) | all year | 004 |
| Flow, total | monthly total | report only (Mgal) | all year | 004 |
| Overflows | monthly total | report only (occur/mo) | all year | 004 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 004 |
| Oil and grease visual | daily maximum | report only (N=0;Y=1) | all year | 004 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | WWC |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | WWC |
| pH | daily minimum | report only (SU) | all year | WWC |
| pH | daily minimum | report only (SU) | all year | WWC |
| pH | daily maximum | report only (SU) | all year | WWC |
| pH | daily maximum | report only (SU) | all year | WWC |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | WWC |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | WWC |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | WWC |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | WWC |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | WWC |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | WWC |
| Floating solids, waste or visible foam-visual | daily maximum | report only (N=0;Y=1) | all year | WWC |
| Floating solids, waste or visible foam-visual | daily maximum | report only (N=0;Y=1) | all year | WWC |
| E. coli, colony forming units [CFU] | daily maximum | report only (#/100mL) | all year | WWC |
| E. coli, colony forming units [CFU] | daily maximum | report only (#/100mL) | all year | WWC |
| Oil and grease visual | daily maximum | report only (N=0;Y=1) | all year | WWC |
| Oil and grease visual | daily maximum | report only (N=0;Y=1) | all year | WWC |
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/SD0027481 · MCP: https://passage-data.com/mcp