PacifiCorp

NPDES permit UT0025623 · Major NON-POTW · effective, expires 2029-01-31 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Iron, total [as Fe] (1).

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 (44)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 80.5 deg F Apr, May, Jun
001Temperature, water deg. fahrenheitDAILY MX <= 73.7 deg F Oct, Nov, Dec
001Temperature, water deg. fahrenheitDAILY MX <= 70.9 deg F Jan, Feb, Mar
001Temperature, water deg. fahrenheitDAILY MX <= 81.8 deg F Jul, Aug, Sep
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 100 mg/L all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Phosphorus, total [as P]30DA AVG report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX <= .022 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .2 mg/L all year
001Copper, total [as Cu]DAILY MX <= 1 mg/L all year
001Copper, total [as Cu]QRTR AVG <= 73 lb/qtr Sep
001Copper, total [as Cu]QRTR AVG <= 58 lb/qtr Dec
001Copper, total [as Cu]QRTR AVG <= 54 lb/qtr Mar
001Copper, total [as Cu]QRTR AVG <= 68 lb/qtr Jun
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Lead, total [as Pb]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]QRTR AVG <= .63 mg/L Mar, Jun, Sep, Dec
001Zinc, total [as Zn]DAILY MX <= .87 mg/L all year
001Aluminum, total [as Al]DAILY MX report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Chlorine, total residualDAILY MX <= .03 mg/L Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= .05 mg/L Oct, Nov, Dec
001Chlorine, total residualDAILY MX <= .06 mg/L Jan, Feb, Mar, Apr, May, Jun
001Solids, total dissolvedDAILY MX <= 2059.9 mg/L Jul, Aug, Sep
001Solids, total dissolvedDAILY MX <= 2317.2 mg/L Jan, Feb, Mar
001Solids, total dissolvedDAILY MX <= 2481.5 mg/L Oct, Nov, Dec
001Solids, total dissolvedDAILY MX <= 2712.6 mg/L Apr, May, Jun
001Mercury, total [as Hg]QRTR AVG <= .000029 mg/L Mar, Jun, Sep, Dec
001Mercury, total [as Hg]DAILY MX report only all year
001Flow, totalDAILY MX <= 2.9 MGD Jul, Aug, Sep
001Flow, totalDAILY MX <= 2.3 MGD Oct, Nov, Dec
001Flow, totalDAILY MX <= 2.2 MGD Jan, Feb, Mar
001Flow, totalDAILY MX <= 2.7 MGD Apr, May, Jun
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 Apr, May, Jun, Oct, Nov, Dec
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX <= 0 pass=0;fail=1 Jan, Feb, Mar, Jul, Aug, Sep

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