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WY Basin Operating LLC

Industrial or other facility, (Unknown City), Wyoming. NPDES permit WY0096776, in force until Nov 30, 2026. Last 12 months: no values over a limit, 36 of 57 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 45 days after each period: outfall 001 form MS twice a year (4 values), outfall 001 form QS twice a year (12 values), outfall 002 form MS twice a year (4 values), outfall 002 form QS twice a year (12 values), outfall DLSR form MS twice a year (10 values), outfall TRIB form MS twice a year (14 values), and 5 more forms

Renewal application due

Jun 3, 2026 · 180 days before expiry; your permit may set another date

Last report on file

June 2026

Oct 2024 – Sep 2025

0 values over a limit, 0 required values missing, 0 of 74 reports late

Limits in force (84)

How strict are these limits?

• Iron, dissolved [as Fe], daily maximum 300 ug/L — stricter than 95% of 45 other minor industrial and other permits in Wyoming; 4% have the same limit
• Selenium, total [as Se], daily maximum 5 ug/L — stricter than 81% of 93 other minor industrial and other permits nationwide; 14% have the same limit
• Chloride, daily maximum 230 mg/L — stricter than 73% of 228 other minor industrial and other permits in Wyoming; 13% have the same limit

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/WY0096776 · MCP: https://passage-data.com/mcp