Granite Creek Operating LLC

NPDES permit WY0003140 · Minor NON-POTW · effective, expires 2027-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
7required values missing, on 2 form(s)
0of 31 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among WY permits in EPA's filings — check your permit).

Limits in force (19)

OutfallParameterStatisticLimitMonths
001Specific conductanceDAILY MX <= 7500 umho/cm all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Sulfide, total [as S]DAILY MX report only all year
001Radium 226 + radium 228, totalDAILY MX <= 22 pCi/L all year
001ChlorideDAILY MX <= 230 mg/L all year
001FlowDAILY MX report only all year
001FlowDAILY MX report only all year
001FlowMO AVG <= .3 MGD all year
001FlowMO AVG <= .3 MGD all year
001SulfateDAILY MX <= 3000 mg/L all year
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year
001Pass/Fail Static 48Hr Acute Daphnia Magna4C <= 0 pass=0;fail=1 all year
001Pass/Fail Static 96 Hr Acute Pimephales Promelas9D <= 0 pass=0;fail=1 all year
DMP1pHINST MAX report only all year
DMP1pHINST MIN report only all year
DMP1Sulfide, total [as S]DAILY MX report only all year
DMP1Radium 226 + radium 228, totalDAILY MX report only all year
STR1Radium 226 + radium 228, totalDAILY MX report only 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