Big Muddy Operating, LLC

NPDES permit WY0000710 · Minor NON-POTW · effective, expires 2028-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
1of 4 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (20)

OutfallParameterStatisticLimitMonths
001Specific conductanceDAILY MX <= 7500 umho/cm all year
001Specific conductanceDAILY MX <= 7500 umho/cm all year
001pHINST MIN >= 6.5 SU all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001pHINST MAX <= 9 SU all year
001Sulfide, total [as S]DAILY MX report only all year
001Sulfide, total [as S]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX <= 3000 mg/L all year
001Sulfate, total [as SO4]DAILY MX <= 3000 mg/L all year
001Radium 226 + radium 228, totalDAILY MX <= 60 pCi/L all year
001Radium 226 + radium 228, totalDAILY MX <= 60 pCi/L all year
001ChlorideDAILY MX <= 2000 mg/L all year
001ChlorideDAILY MX <= 2000 mg/L all year
001FlowDAILY MX <= .0036 MGD all year
001FlowDAILY MX <= .0036 MGD all year
001FlowMO AVG report only all year
001FlowMO AVG report only all year
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states