Union Pacific Railroad

NPDES permit WY0000647 · Minor NON-POTW · effective, expires 2026-10-31 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 90 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (20)

OutfallParameterStatisticLimitMonths
003pHINST MAX <= 9 SU all year
003pHINST MAX <= 9 SU all year
003pHINST MIN >= 6.5 SU all year
003pHINST MIN >= 6.5 SU all year
003Solids, total suspendedMO AVG <= 20 mg/L all year
003Solids, total suspendedMO AVG <= 20 mg/L all year
003Solids, total suspendedWKLY AVG <= 30 mg/L all year
003Solids, total suspendedWKLY AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 45 mg/L all year
003Solids, total suspendedDAILY MX <= 45 mg/L all year
003DurationMO TOTAL report only all year
003DurationMO TOTAL report only all year
003FlowDAILY MX report only all year
003FlowDAILY MX report only all year
003FlowMO AVG report only all year
003FlowMO AVG report only all year
003Produced water, oil and greaseDAILY MX <= 10 mg/L all year
003Produced water, oil and greaseDAILY MX <= 10 mg/L all year
003TetrachloroethyleneDAILY MX <= 17 ug/L all year
003TetrachloroethyleneDAILY MX <= 17 ug/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