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Pathfinder Mines Corp.

Uranium-Radium-Vanadium Ores, Shirley Basin, Wyoming. NPDES permit WY0096466, in force until Dec 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M1 yearly (6 values), form M2 yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (21)

ParameterStatisticLimitMonths
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous minimum≥ 6.5 SUall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Arsenic, total [as As]daily maximum≤ 1 mg/Lall year
Arsenic, total [as As]monthly average≤ .5 mg/Lall year
Zinc, total [as Zn]daily maximum≤ 1 mg/L (alert, not enforceable)all year
Zinc, total [as Zn]monthly average≤ .5 mg/L (alert, not enforceable)all year
Radium 226, totaldaily maximum≤ 30 pCi/Lall year
Radium 226, totalmonthly average≤ 10 pCi/Lall year
Radium 226, dissolveddaily maximum≤ 10 pCi/Lall year
Radium 226, dissolvedmonthly average≤ 3 pCi/Lall year
Durationmonthly totalreport only (d)all year
Durationmonthly totalreport only (d)all year
Flow, maximum during 24 hr perioddaily maximumreport only (MGD)all year
Flow, maximum during 24 hr perioddaily maximumreport only (MGD)all year
Nitrogen, Ammonia Totalmonthly average≤ 100 mg/Lall year
Flow, totalmonthly averagereport only (Mgal)all year
Flow, totalmonthly averagereport only (Mgal)all year
Chemical Oxygen Demand [COD]daily maximum≤ 500 mg/Lall year
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year

How strict are these limits?

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

Same industry: the 3 Metal Mining permits in Wyoming.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0096466 · MCP: https://passage-data.com/mcp