County annual report · FIPS 16051
2021 Jefferson County, ID Power Outage Report
In 2021, customers in Jefferson County, ID went without power for an average of 4.3 hours, a total of 39K customer-hours (Idaho average 5.7 hours). That ranks 23rd worst of 43 Idaho counties and 1468th 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 Jefferson 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 | October 26, 2021 10:45 | October 26, 2021 11:30 | 45m | 3,630 | 1,166 |
| 2 | June 25, 2021 14:00 | June 25, 2021 14:30 | 30m | 2,401 | 1,201 |
| 3 | June 12, 2021 19:30 | June 13, 2021 00:45 | 5h 15m | 1,852 | 2,868 |
| 4 | May 16, 2021 11:45 | May 16, 2021 12:00 | 15m | 1,717 | 429 |
| 5 | March 27, 2021 19:45 | March 28, 2021 01:00 | 5h 15m | 1,596 | 406 |
| 6 | February 3, 2021 12:45 | February 3, 2021 17:15 | 4h 30m | 1,083 | 1,722 |
| 7 | February 14, 2021 10:15 | February 14, 2021 13:30 | 3h 15m | 1,070 | 1,244 |
| 8 | April 10, 2021 21:45 | April 11, 2021 17:30 | 19h 45m | 751 | 3,120 |
| 9 | June 23, 2021 18:00 | June 24, 2021 03:00 | 9h | 687 | 1,661 |
| 10 | March 9, 2021 06:45 | March 9, 2021 15:30 | 8h 45m | 677 | 1,706 |
Outage episodes by size in 2021: 54 reached 100+ customers, 7 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 Jefferson 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2021 | 4.3 hrs | 1.86 | 2.0 hrs | 1.19 |
| Fall River Rural Elec Coop Inc | 2021 | 71 min | 0.61 | 57 min | 0.50 |
| 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 ÷ 8,995 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. Jefferson County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Jefferson 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/jefferson-county