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Industrial or other facility, Mount Vernon, Washington. NPDES permit WA0031721 expired Dec 31, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Turbidity | daily maximum | ≤ 25 NTU | Apr–Sep |
| Turbidity | daily maximum | ≤ 25 NTU | Apr–Sep |
| pH | daily minimum | ≥ 6 SU | Apr–Sep |
| pH | daily minimum | ≥ 6 SU | Apr–Sep |
| pH | daily maximum | ≤ 9 SU | Apr–Sep |
| pH | daily maximum | ≤ 9 SU | Apr–Sep |
| Flow | daily maximum | report only (gal/d) (alert, not enforceable) | Apr–Sep |
| Flow | daily maximum | report only (gal/d) (alert, not enforceable) | Apr–Sep |
Cited limits by parameter: Washington'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/WA0031721 · MCP: https://passage-data.com/mcp