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Phoenix Production Sheldon Dome

Crude Petroleum And Natural Gas, Cody, Wyoming. NPDES permit WY0024953 expired Mar 31, 2020; its limits still apply. Last 12 months: no values over a limit, 15 required values missing, 4 of 4 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A twice a year, form W twice a year
Last report on file
June 2026
Oct 2024 – Sep 2025
4 values over a limit, 30 required values missing, 4 of 4 reports late

Limits in force (16)

ParameterStatisticLimitMonths
Specific conductancedaily maximum≤ 7500 uS/cmall year
Sulfate [as S]daily maximum≤ 2500 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Chloride [as Cl]daily maximum≤ 2000 mg/Lall year
Radium 226, totaldaily maximum≤ 60 pCi/Lall year
Floating solids, waste or visible foam-visualdaily maximum≤ 0 N=0;Y=1all year
Sulfide-hydrogen sulfide [undissociated]30-day average≤ 200 mg/Lall year
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year
Mercury, total [as Hg]daily maximumreport only (ug/L)all year
Flow, total30-day averagereport only (MGD)all year
Flow, totaldaily maximumreport only (MGD)all year
Oil and grease visualinstantaneous maximum≤ 0 N=0;Y=1all year
Pass/Fail Static 48Hr Acute Daphnia Magnainstantaneous maximum≤ 0 pass=0;fail=1all year
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelasinstantaneous maximum≤ 0 pass=0;fail=1all year

How strict are these limits?

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/WY0024953 · MCP: https://passage-data.com/mcp