County annual report · FIPS 16031
2021 Cassia County, ID Power Outage Report
In 2021, customers in Cassia County, ID went without power for an average of 0.7 hours, a total of 9,921 customer-hours (Idaho average 5.7 hours). That ranks 41st worst of 43 Idaho counties and 2769th 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 Cassia 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 | July 18, 2021 00:45 | July 18, 2021 02:15 | 1h 30m | 4,268 | 4,322 |
| 2 | July 7, 2021 15:45 | July 7, 2021 16:30 | 45m | 1,773 | 1,330 |
| 3 | May 17, 2021 02:00 | May 17, 2021 05:00 | 3h | 433 | 1,262 |
| 4 | August 6, 2021 07:00 | August 6, 2021 08:45 | 1h 45m | 422 | 736 |
| 5 | August 6, 2021 10:45 | August 6, 2021 12:00 | 1h 15m | 266 | 213 |
| 6 | October 25, 2021 18:15 | October 25, 2021 19:30 | 1h 15m | 181 | 91 |
| 7 | November 17, 2021 16:15 | November 17, 2021 17:45 | 1h 30m | 142 | 122 |
| 8 | October 18, 2021 09:15 | October 18, 2021 10:15 | 1h | 96 | 96 |
| 9 | September 19, 2021 18:15 | September 19, 2021 19:45 | 1h 30m | 91 | 137 |
| 10 | October 24, 2021 22:30 | October 25, 2021 02:15 | 3h 45m | 87 | 267 |
Outage episodes by size in 2021: 7 reached 100+ customers, 2 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 Cassia 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 |
| Raft Rural Elec Coop Inc | - | - | - | - | - |
| City of Burley - (ID) | - | - | - | - | - |
| East End Mutual Elec Co Ltd | - | - | - | - | - |
| United Electric Co-op, Inc - (ID) | - | - | - | - | - |
| City of Albion - (ID) | - | - | - | - | - |
| City of Declo - (ID) | - | - | - | - | - |
| South Side Electric, Inc | - | - | - | - | - |
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 ÷ 14,726 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. Cassia County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cassia 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/cassia-county