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Lower Granite Lock and Dam - Usace

Federal facility (Electric Services), Pomeroy, Washington. NPDES permit WA0026794, in force until Mar 31, 2027. Last 12 months: no values over a limit, 10 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 20 days after each period: outfall 001 form A monthly (11 values), outfall 002 form A monthly (11 values), outfall 003 form A monthly (15 values), outfall 003A form A monthly (15 values), outfall 004 form A monthly (15 values), outfall 005 form A monthly (15 values), and 7 more forms

Renewal application due

Oct 2, 2026 · 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, 14 required values missing, 1 of 156 reports late

Limits in force (158)

How strict are these limits?

• 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
• pH, instantaneous minimum at least 6.5 SU — stricter than 45% of 72 other minor federal facilities nationwide; 49% 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/WA0026794 · MCP: https://passage-data.com/mcp