Pacificorp

NPDES permit CO0046931 · Minor NON-POTW · administratively continued, expires 2025-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-09-30 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

39values over a limit
0required values missing, on 0 form(s)
6of 59 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (16), Iron, total recoverable (13), LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia (5).

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 (166)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 4 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 1.6 lb/d all year
001Solids, total suspendedMX 7D AV <= 2.4 lb/d all year
001Chloride [as Cl]30DA AVG report only all year
001Arsenic, total recoverable30DA AVG report only all year
001Iron, total recoverable30DA AVG <= 349000 ug/L all year
001Iron, total recoverable30DA AVG <= 112600 ug/L all year
001Iron, total recoverableDAILY MX report only all year
001Iron, total recoverable30DA AVG <= 18.7 lb/d all year
001Iron, total recoverable30DA AVG <= 6.05 lb/d all year
001Manganese, dissolved [as Mn]30DA AVG report only all year
001Manganese, dissolved [as Mn]DAILY MX report only all year
001Nickel, total recoverable30DA AVG report only all year
001Cadmium, total recoverable30DA AVG report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Molybdenum, total recoverable30DA AVG report only all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Oil and greaseDAILY MX <= .54 lb/d all year
001Chromium, trivalent total recoverableDAILY MX report only all year
001Radium 226 + radium 228, total30DA AVG report only all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Boron, total30DA AVG report only all year
001Oil and grease visualDAILY MX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE report only all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % all year
002pHMINIMUM report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM report only all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedMX 7D AV <= 45 mg/L all year
002Solids, total suspended30DA AVG <= 1.6 lb/d all year
002Solids, total suspendedMX 7D AV <= 2.4 lb/d all year
002Cyanide, total [as CN]DAILY MX report only all year
002Chloride [as Cl]30DA AVG report only all year
002Arsenic, total recoverable30DA AVG report only all year
002Iron, total recoverable30DA AVG report only all year
002Iron, total recoverable30DA AVG <= 112600 ug/L all year
002Iron, total recoverableDAILY MX report only all year
002Iron, total recoverableDAILY MX report only all year
002Iron, total recoverable30DA AVG report only all year
002Iron, total recoverable30DA AVG <= 6.05 lb/d all year
002Iron, total recoverableDAILY MX report only all year
002Iron, total recoverableDAILY MX report only all year
002Chromium, dissolved [as Cr]30DA AVG report only all year
002Chromium, dissolved [as Cr]DAILY MX report only all year
002Manganese, dissolved [as Mn]30DA AVG report only all year
002Manganese, dissolved [as Mn]DAILY MX report only all year
002Nickel, total recoverable30DA AVG report only all year
002Cadmium, total recoverable30DA AVG report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only all year
002Molybdenum, total recoverable30DA AVG report only all year
002Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
002Zinc, potentially dissolved30DA AVG report only all year
002Zinc, potentially dissolvedDAILY MX report only all year
002Silver, potentially dissolved30DA AVG report only all year
002Silver, potentially dissolvedDAILY MX report only all year
002Copper, potentially dissolved30DA AVG report only all year
002Copper, potentially dissolvedDAILY MX report only all year
002Arsenic, potentially dissolvedDAILY MX report only all year
002Cadmium, potentially dissolvd30DA AVG report only all year
002Cadmium, potentially dissolvdDAILY MX report only all year
002Chromium, trivalent, potentially dissolvd30DA AVG report only all year
002Chromium, trivalent, potentially dissolvdDAILY MX report only all year
002Lead, potentially dissolvd30DA AVG report only all year
002Lead, potentially dissolvdDAILY MX report only all year
002Nickel, potentially dissolvd30DA AVG report only all year
002Nickel, potentially dissolvdDAILY MX report only all year
002Selenium, potentially dissolvd30DA AVG report only all year
002Selenium, potentially dissolvdDAILY MX report only all year
002Oil and greaseINST MAX <= 10 mg/L all year
002Oil and greaseDAILY MX <= .54 lb/d all year
002Chromium, trivalent total recoverableDAILY MX report only all year
002Radium 226 + radium 228, total30DA AVG report only all year
002Flow, in conduit or thru treatment plant30DA AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
002Solids, total dissolved30DA AVG report only all year
002Solids, total dissolvedDAILY MX report only all year
002Mercury, total [as Hg]30DA AVG report only all year
002Boron, total30DA AVG report only all year
002Oil and grease visualDAILY MX report only all year
002LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE report only all year
002LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
002LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE report only all year
002LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspended30DA AVG <= 30 mg/L all year
003Solids, total suspendedMX 7D AV <= 45 mg/L all year
003Solids, total suspended30DA AVG <= .73 lb/d all year
003Solids, total suspendedMX 7D AV <= 1.09 lb/d all year
003Cyanide, total [as CN]DAILY MX report only all year
003Chloride [as Cl]30DA AVG report only all year
003Arsenic, total recoverable30DA AVG report only all year
003Iron, total recoverable30DA AVG <= 1000 ug/L all year
003Iron, total recoverableDAILY MX report only all year
003Iron, total recoverable30DA AVG <= .0242 lb/d all year
003Chromium, dissolved [as Cr]30DA AVG report only all year
003Chromium, dissolved [as Cr]DAILY MX report only all year
003Manganese, dissolved [as Mn]30DA AVG <= 2071 ug/L all year
003Manganese, dissolved [as Mn]DAILY MX <= 3749 ug/L all year
003Manganese, dissolved [as Mn]30DA AVG <= .05 lb/d all year
003Manganese, dissolved [as Mn]DAILY MX <= .0907 lb/d all year
003Nickel, total recoverable30DA AVG report only all year
003Cadmium, total recoverable30DA AVG report only all year
003Cadmium, total recoverableDAILY MX report only all year
003Lead, total recoverableDAILY MX report only all year
003Molybdenum, total recoverable30DA AVG report only all year
003Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
003Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
003Zinc, potentially dissolved30DA AVG <= 226 ug/L all year
003Zinc, potentially dissolvedDAILY MX <= 298 ug/L all year
003Zinc, potentially dissolved30DA AVG <= .00547 lb/d all year
003Zinc, potentially dissolvedDAILY MX <= .00721 lb/d all year
003Silver, potentially dissolved30DA AVG report only all year
003Silver, potentially dissolvedDAILY MX report only all year
003Copper, potentially dissolved30DA AVG report only all year
003Copper, potentially dissolvedDAILY MX report only all year
003Arsenic, potentially dissolved30DA AVG report only all year
003Arsenic, potentially dissolvedDAILY MX report only all year
003Cadmium, potentially dissolvd30DA AVG <= .71 ug/L all year
003Cadmium, potentially dissolvdDAILY MX <= 3.1 ug/L all year
003Cadmium, potentially dissolvd30DA AVG <= .000017 lb/d all year
003Cadmium, potentially dissolvdDAILY MX <= .00075 lb/d all year
003Chromium, trivalent, potentially dissolvd30DA AVG report only all year
003Chromium, trivalent, potentially dissolvdDAILY MX report only all year
003Lead, potentially dissolvd30DA AVG <= 5.2 ug/L all year
003Lead, potentially dissolvdDAILY MX <= 135 ug/L all year
003Lead, potentially dissolvd30DA AVG <= .000126 lb/d all year
003Lead, potentially dissolvdDAILY MX <= .00327 lb/d all year
003Nickel, potentially dissolvd30DA AVG report only all year
003Nickel, potentially dissolvdDAILY MX report only all year
003Selenium, potentially dissolvd30DA AVG report only all year
003Selenium, potentially dissolvdDAILY MX report only all year
003Oil and greaseINST MAX <= 10 mg/L all year
003Oil and greaseDAILY MX <= .54 lb/d all year
003Chromium, trivalent total recoverableDAILY MX report only all year
003Radium 226 + radium 228, total30DA AVG report only all year
003Flow, in conduit or thru treatment plant30DA AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Mercury, total [low level]30DA AVG report only all year
003Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
003Solids, total dissolved30DA AVG report only all year
003Solids, total dissolvedDAILY MX report only all year
003Boron, total30DA AVG report only all year
003Oil and grease visualDAILY MX report only all year
003LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
003LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE 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