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Enterprise Products Operating, LP

Natural Gas Transmission, Opal, Wyoming. NPDES permit WY0056499, in force until Nov 30, 2028. Last 12 months: over a limit 5 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form AA yearly, form MQ quarterly, form QQ quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
11 values over a limit, 4 required values missing, 2 of 17 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025Fluoride, daily maximum3.32 mg/L≤ 2 mg/L66%
November 2025Fluoride, daily maximum3.76 mg/L≤ 2 mg/L88%
December 2025Fluoride, daily maximum3.73 mg/L≤ 2 mg/L87%
January 2026Fluoride, daily maximum3.93 mg/L≤ 2 mg/L97%
February 2026Fluoride, daily maximum3.45 mg/L≤ 2 mg/L73%

Limits in force (21)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Fluoridedaily maximumreport only (mg/L)all year
Fluoridedaily maximumreport only (mg/L)all year
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year
Aluminum, dissolved [as Al]daily maximum≤ 87 ug/Lall year
Durationmonthly totalreport only (d)all year
Durationmonthly totalreport only (d)all year
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year
Solids, total dissolvedannual total≤ 366 ton/yrall year
Solids, total dissolvedmonthly totalreport only (ton/mo)all year
Solids, total dissolvedmonthly totalreport only (ton/mo)all year
Flowmonthly averagereport only (MGD)all year
Flowmonthly averagereport only (MGD)all year
Flowdaily maximumreport only (MGD)all year
Flowdaily maximumreport only (MGD)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0056499 · MCP: https://passage-data.com/mcp