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Cardinal Wyoming LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0035521 expired Oct 31, 2026. 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 BS twice a year, outfall 001 form MS twice a year, outfall 001 form SS twice a year, outfall DMP1 form DM twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 26 reports late

Limits in force (14)

ParameterStatisticLimitMonthsOutfall
Specific conductancedaily maximum≤ 7500 umho/cmall year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Sulfide, total [as S]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]daily maximum≤ 3000 mg/Lall year001
Cadmium, dissolved [as Cd]daily maximum≤ 2 ug/Lall year001
Chloridedaily maximum≤ 2000 mg/Lall year001
Flowdaily maximumreport only (MGD)all year001
Flowmonthly averagereport only (MGD)all year001
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year001
pHinstantaneous maximumreport only (SU)all yearDMP1
pHinstantaneous minimumreport only (SU)all yearDMP1
Sulfide, total [as S]daily maximumreport only (mg/L)all yearDMP1

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

Same industry: the 209 Oil and Gas Extraction 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/WY0035521 · MCP: https://passage-data.com/mcp