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State Commercial Banks, Brookings, South Dakota. NPDES permit SD0028568 expired Feb 28, 2023; its limits still apply. Last 12 months: no values over a limit, 1 of 11 reports late. 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 (gal/min) | all year |
| Flow rate | daily maximum | report only (gal/min) | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year |
| Benzene | daily maximum | ≤ 5 ug/L | all year |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year |
| BTEX | daily maximum | ≤ 100 ug/L | all year |
| Flow, total | monthly total | report only (gal) | all year |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | 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/SD0028568 · MCP: https://passage-data.com/mcp