IDAHO POWER COMPANY

NPDES permit OR0027278 · Minor NON-POTW · administratively continued, expires 2009-07-31 · 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 2009-07-31 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 20 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among OR permits in EPA's filings — check your permit).

Limits in force (16)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 55 deg F all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oil & GreaseVALUE <= 10 mg/L all year
001Flow, in conduit or thru treatment plantMO MAX report only all year
002Temperature, water deg. fahrenheitDAILY MX <= 55 deg F all year
002Oil & GreaseVALUE <= 10 mg/L all year
002Flow, in conduit or thru treatment plantMO MAX report only all year
003Temperature, water deg. fahrenheitDAILY MX <= 55 deg F all year
003Oil & GreaseVALUE <= 10 mg/L all year
003Flow, in conduit or thru treatment plantMO MAX report only all year
004pHDAILY MN >= 6 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedMO AVG <= 50 mg/L all year
004Oil & GreaseVALUE <= 10 mg/L all year
004Flow, in conduit or thru treatment plantDAILY MX <= 1.5 MGD all year
SUMFlow, in conduit or thru treatment plantDAILY MX <= 9 MGD 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