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Pronghorn Operating, LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0051837, in force until Feb 28, 2027. 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 MS twice a year (16 values), outfall 003 form MS twice a year (16 values), outfall DPR form MS twice a year (10 values), outfall TRB1 form MS twice a year (10 values), outfall UPR form MS twice a year (10 values), outfall 001 form AA yearly, and 3 more forms

Renewal application due

Sep 1, 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 66 reports late

Limits in force (78)

These limits come from an earlier version of this permit (version 3 in EPA's file); its current version holds none yet. A renewal can change them.

How strict are these limits?

• Chloride, daily maximum 150 mg/L — stricter than 87% of 228 other minor industrial and other permits in Wyoming; 12% have the same limit
• Arsenic, total recoverable, daily maximum 8.4 ug/L — stricter than 80% of 94 other minor industrial and other permits nationwide; 12% have the same limit

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

Same industry: the 209 Oil and Gas Extraction permits in Wyoming.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0051837 · MCP: https://passage-data.com/mcp