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US Forest Service - Bighorn National Forest

Federal facility (Sewerage Systems), Unknown, Wyoming. NPDES permit WY0020931 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form SD quarterly (19 values), outfall DMP1 form SS twice a year (3 values), outfall 002 form SS twice a year, outfall 003 form SS twice a year, outfall 004 form SS twice a year, outfall SUM1 form SS twice a year

Last report on file

June 2026

Oct 2024 – Sep 2025

1 value over a limit, 0 required values missing, 1 of 24 reports late

Limits in force (74)

How strict are these limits?

• Chlorine, total residual, daily maximum .011 mg/L — stricter than 87% of 64 other minor federal facilities nationwide; 2% 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
• E. coli, daily maximum 576 #/100mL — stricter than 14% of 54 other minor federal facilities nationwide

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

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0020931 · MCP: https://passage-data.com/mcp