Wesco Operating - Tensleep #1

NPDES permit WY0025232 · Minor NON-POTW · administratively continued, expires 2020-03-31 · 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.

This permit expired on 2020-03-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 4 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 (16)

OutfallParameterStatisticLimitMonths
001Specific conductanceDAILY MX <= 7500 uS/cm all year
001Sulfate [as S]DAILY MX <= 2500 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Chloride [as Cl]DAILY MX <= 2000 mg/L all year
001Radium 226, totalDAILY MX <= 60 pCi/L all year
001Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
001Sulfide-hydrogen sulfide [undissociated]30DA AVG <= 200 mg/L all year
001Solids, total dissolvedDAILY MX <= 5000 mg/L all year
001Mercury, total [as Hg]DAILY MX report only all year
001Flow, total30DA AVG report only all year
001Flow, totalDAILY MX report only all year
001Oil and grease visualINST MAX <= 0 N=0;Y=1 all year
001Pass/Fail Static 48Hr Acute Daphnia MagnaINST MAX <= 0 pass=0;fail=1 all year
001Pass/Fail Static 96 Hr Acute Pimephales PromelasINST MAX <= 0 N=0;Y=1 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