County annual report · FIPS 16001
2025 Ada County, ID Power Outage Report
In 2025, customers in Ada County, ID went without power for an average of 1.1 hours, a total of 280K customer-hours (Idaho average 5.6 hours). That ranks 41st worst of 43 Idaho counties and 2728th of 3,000 nationally.
Compared with ID, the US and 2024
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Ada County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 20, 2025 15:45 | October 20, 2025 17:00 | 1h 15m | 10,197 | 7,157 |
| 2 | September 26, 2025 16:45 | September 27, 2025 00:30 | 7h 45m | 6,823 | 9,601 |
| 3 | February 4, 2025 16:30 | February 4, 2025 16:45 | 15m | 6,752 | 1,688 |
| 4 | February 13, 2025 20:30 | February 18, 2025 22:15 | 5d 1h | 6,527 | 3,816 |
| 5 | May 10, 2025 04:30 | May 10, 2025 07:00 | 2h 30m | 6,214 | 5,003 |
| 6 | June 14, 2025 03:30 | June 14, 2025 05:15 | 1h 45m | 5,091 | 6,820 |
| 7 | June 7, 2025 17:00 | June 7, 2025 17:45 | 45m | 4,392 | 3,294 |
| 8 | July 26, 2025 16:00 | July 26, 2025 19:15 | 3h 15m | 4,140 | 3,059 |
| 9 | December 5, 2025 21:30 | December 6, 2025 05:45 | 8h 15m | 3,710 | 15K |
| 10 | August 1, 2025 01:00 | August 1, 2025 10:00 | 9h | 3,672 | 5,856 |
Outage episodes by size in 2025: 174 reached 100+ customers, 38 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Ada County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Idaho Power Co | 2024 | 6.0 hrs | 1.97 | 5.0 hrs | 1.84 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Idaho's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 256,537 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Ada County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ada County, ID annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/idaho/ada-county