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Pronghorn Operating, LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0049158, in force until Jun 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 004 form P2 twice a year, outfall 004 form P3 yearly, outfall 004 form P6 twice a year, outfall 004 form T4 twice a year, outfall 005 form P2 twice a year, outfall 005 form P3 yearly, and 77 more forms

Renewal application due

Jan 1, 2027 · 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 416 reports late

Limits in force (514)

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 [as As], daily maximum 8.4 ug/L — stricter than 79% of 94 other minor industrial and other permits nationwide; 16% have the same limit
• Barium, total [as Ba], daily maximum 1800 ug/L — stricter than 10% of 20 other minor industrial and other permits nationwide; 85% 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/WY0049158 · MCP: https://passage-data.com/mcp