County annual report · FIPS 16039
2021 Elmore County, ID Power Outage Report
In 2021, customers in Elmore County, ID went without power for an average of 3.3 hours, a total of 45K customer-hours (Idaho average 5.7 hours). That ranks 27th worst of 43 Idaho counties and 1733rd of 2,974 nationally.
Compared with ID, the US and 2020
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Elmore County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 3, 2021 19:45 | December 3, 2021 20:00 | 15m | 5,613 | 1,403 |
| 2 | March 29, 2021 08:45 | March 29, 2021 23:15 | 14h 30m | 4,838 | 14K |
| 3 | December 14, 2021 17:00 | December 14, 2021 19:00 | 2h | 2,321 | 2,205 |
| 4 | May 22, 2021 10:00 | May 22, 2021 14:45 | 4h 45m | 1,526 | 5,287 |
| 5 | December 18, 2021 08:00 | December 18, 2021 12:30 | 4h 30m | 904 | 3,588 |
| 6 | April 24, 2021 16:45 | April 24, 2021 18:00 | 1h 15m | 867 | 1,084 |
| 7 | May 3, 2021 15:15 | May 3, 2021 16:45 | 1h 30m | 866 | 668 |
| 8 | June 23, 2021 05:15 | June 23, 2021 06:45 | 1h 30m | 847 | 500 |
| 9 | May 10, 2021 00:00 | May 10, 2021 00:15 | 15m | 773 | 193 |
| 10 | June 3, 2021 14:30 | June 3, 2021 16:00 | 1h 30m | 565 | 846 |
Outage episodes by size in 2021: 34 reached 100+ customers, 4 reached 1,000+ customers, 0 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 Elmore County reported on EIA Form 861 for 2021, 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 | 2021 | 3.1 hrs | 1.42 | 2.6 hrs | 1.25 |
| Bonneville Power Administration | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Idaho's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,404 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. Elmore County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Elmore County, ID annual power outage report, 2021, 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/2021/idaho/elmore-county