How reliable is the power in Idaho?
Idaho ranks 34th of 45 states without major events and 17th with them (1st = fewest minutes), 23 above the U.S. 129 and 457 below the U.S. 662. Major events added 52 minutes, 25% of the with-events total. The figure covers 952,059 customers, 97% of the 981,569 EIA lists for Idaho.
Idaho with and without major events
minutes without power per customer, 2024, Idaho and U.S.
- 152Idaho, no major events
- 129U.S., no major events
- 204Idaho, with major events
- 662U.S., with major events
| Measure | Idaho without | Idaho with | U.S. without | U.S. with |
|---|---|---|---|---|
| SAIDI, minutes per customer | 152 | 204 | 129 | 662 |
| SAIFI, interruptions per customer | 1.14 | 1.31 | 1.06 | 1.53 |
| CAIDI, minutes per interruption | 134 | 156 | 122 | 433 |
| Median utility, SAIDI minutes | 127 | 193 | — | — |
Which Idaho utilities move the number
Idaho Power Co serves 65% of the customers in the Idaho figure: 66% of lost customer-minutes with major events, 70% without. Without Idaho Power Co, the weighted figure would be 200 minutes with major events and 131 without, against 204 and 152.
- Idaho Power Co: 621,746 customers (65%), 164 min without and 206 with; 66% of lost minutes with major events, 70% without.
- Avista Corp: 145,203 customers (15%), 165 min without and 225 with; 17% of lost minutes with major events, 17% without.
- PacifiCorp: 89,035 customers (9%), 129 min without and 265 with; 12% of lost minutes with major events, 8% without.
All Idaho utilities in the 2024 file
24 utilities in the 2024 EIA-861 files for Idaho: 8 follow IEEE 1366, 1 uses another method, 15 filed no reliability figures. 9 are listed.
| Fall River Rural Elec Coop Inc | Cooperative | IEEE 1366 | 18,225 | 7 | 9 | 0.06 | 0.08 | 21 | 1 of 6 | — |
|---|---|---|---|---|---|---|---|---|---|---|
| City of Idaho Falls - (ID) | Municipal | IEEE 1366 | 32,782 | 72 | 72 | 0.65 | 0.65 | 0 | 2 of 6 | — |
| Kootenai Electric Cooperative | Cooperative | IEEE 1366 | 34,499 | 125 | 187 | 0.81 | 1.17 | 33 | 3 of 6 | — |
| PacifiCorp | Investor Owned | IEEE 1366 | 89,035 | 129 | 265 | 1.30 | 1.59 | 51 | 4 of 6 | — |
| Idaho Power Co | Investor Owned | IEEE 1366 | 621,746 | 164 | 206 | 1.21 | 1.37 | 21 | 5 of 6 | — |
| Avista Corp | Investor Owned | IEEE 1366 | 145,203 | 165 | 225 | 1.06 | 1.26 | 27 | 6 of 6 | — |
| Northern Lights, Inc | Cooperative | Other method | 19,609 | 1,220 | 1,612 | — | — | — | Not ranked | other method, not comparable |
| United Electric Co-op, Inc - (ID) | Cooperative | IEEE 1366 | 7,513 | 40 | 50 | 0.43 | 0.70 | 19 | Not ranked | under 10,000 customers |
| Salmon River Electric Coop Inc | Cooperative | IEEE 1366 | 3,056 | 199 | 199 | 2.00 | 2.00 | 0 | Not ranked | under 10,000 customers |
Idaho utilities with no reliability figures
15 in the sales file, no SAIDI or SAIFI row.
| Utility | Type | Customers |
|---|---|---|
| Raft Rural Elec Coop Inc | Cooperative | 2,759 |
| Inland Power & Light Company | Cooperative | 2,269 |
| Lower Valley Energy Inc | Cooperative | 2,040 |
| Missoula Electric Coop, Inc | Cooperative | 71 |
| Vigilante Electric Coop, Inc | Cooperative | — |
| City of Heyburn - (ID) | Municipal | — |
| Lost River Electric Coop Inc | Cooperative | — |
| City of Plummer - (ID) | Not stated | — |
| City of Rupert - (ID) | Municipal | — |
| City of Soda Springs - (ID) | Municipal | — |
| City of Burley - (ID) | Municipal | — |
| City of Bonners Ferry | Municipal | — |
| City of Declo - (ID) | Municipal | — |
| Clearwater Power Company | Cooperative | — |
| Idaho County L&P Coop Assn, Inc | Cooperative | — |
The biggest Idaho utilities against the U.S.
- Idaho Power Co (investor owned, 63% of Idaho customers in the file): SAIDI without major events 164 min, 35 above the U.S. 129; with major events 206 min against 662.
- Avista Corp (investor owned, 15% of Idaho customers in the file): SAIDI without major events 165 min, 36 above the U.S. 129; with major events 225 min against 662.
- PacifiCorp (investor owned, 9% of Idaho customers in the file): SAIDI without major events 129 min, 0 above the U.S. 129; with major events 265 min against 662.
- Kootenai Electric Cooperative (cooperative, 3% of Idaho customers in the file): SAIDI without major events 125 min, 4 below the U.S. 129; with major events 187 min against 662.
- City of Idaho Falls - (ID) (municipal, 3% of Idaho customers in the file): SAIDI without major events 72 min, 57 below the U.S. 129; with major events 72 min against 662.
Idaho by type of utility
Among Idaho utilities that report under IEEE 1366, municipal utilities average 72 minutes without major events and investor owned utilities 161.
| Type | Utilities | Customers | SAIDI without | Median utility | SAIDI with |
|---|---|---|---|---|---|
| Investor Owned | 3 | 855,984 | 161 | 164 | 216 |
| Cooperative | 4 | 63,293 | 84 | 83 | 120 |
| Municipal | 1 | 32,782 | 72 | 72 | 72 |
Next to Idaho in the ranking
Idaho report card
Smart meters: 83% of residential meters, 7 utilities (U.S. 92%). Idaho time-based rates: 2 of 7 utilities, 1.3% of residential customers enrolled (U.S. 10.6%). Idaho efficiency spend: $55.1 per customer (U.S. $124.2). Demand response: 359 W per customer (U.S. 77). Idaho net-metered systems: 24.2 per 1,000 customers. Rankings.
Is your Idaho utility better or worse than the Idaho median?
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More
- Idaho against all states
- Idaho utilities among the best and worst
- Idaho utility reliability and price by company
- Idaho major outage reports from the Department of Energy
- Idaho electricity prices
- Idaho help with your bill
9 Idaho filings in EIA-861 2024 (retrieved 2026-10-01), 6 ranked utilities. Method and sources.
Questions
How many minutes without power did the average Idaho customer have in 2024?
152 minutes without major events and 204 with them (8 IEEE 1366 utilities, customer-weighted).
Why do the two Idaho numbers differ so much?
Major events add 52 of the 204 minutes (25%); Idaho Power Co supplies 66% of the with-events total.
Which Idaho utility reported the fewest and the most minutes?
Among 6 utilities with 10,000+ customers: Fall River Rural Elec Coop Inc 7 minutes without major events, and Avista Corp 165.
Which Idaho utilities use which method?
8 follow IEEE 1366, 1 uses another method, 15 filed no reliability figures.