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Mcnary Lock and Dam - Usace

Federal facility (Electric Services), Umatilla, Washington. NPDES permit WA0026824, in force until Jun 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 20 days after each period: outfall 021 form A monthly (7 values), outfall 022 form A monthly (7 values), outfall SUM form A monthly (1 value)

Renewal application due

Jan 2, 2028 · 180 days before expiry; your permit may set another date

Last report on file

September 2026

Oct 2024 – Sep 2025

0 values over a limit, 2 required values missing, 6 of 36 reports late

Limits in force (15)

How strict are these limits?

• pH, instantaneous minimum at least 7 SU — stricter than 95% of 72 other minor federal facilities nationwide; 4% have the same limit
• Oil & Grease, daily maximum 5 mg/L — stricter than 78% of 84 other minor federal facilities nationwide; 20% have the same limit
• pH, instantaneous maximum 8.5 SU — stricter than 71% of 74 other minor federal facilities nationwide; 27% have the same limit

Cited limits by parameter: Washington's rules and the federal ones.

Same industry: the 21 Electric Services permits in Washington.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0026824 · MCP: https://passage-data.com/mcp