County annual report · FIPS 16001
2018 Ada County, ID Power Outage Report
In 2018, customers in Ada County, ID went without power for an average of 0.7 hours, a total of 170K customer-hours (Idaho average 2.0 hours). That ranks 42nd worst of 44 Idaho counties and 2443rd of 2,798 nationally.
Compared with ID, the US and 2017
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Ada County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 5, 2018 15:30 | June 5, 2018 16:15 | 45m | 12,799 | 5,052 |
| 2 | September 28, 2018 20:30 | September 28, 2018 21:30 | 1h | 7,653 | 5,839 |
| 3 | July 30, 2018 15:30 | July 30, 2018 17:45 | 2h 15m | 5,624 | 1,479 |
| 4 | July 8, 2018 10:45 | July 8, 2018 15:45 | 5h | 5,211 | 7,924 |
| 5 | May 18, 2018 03:30 | May 18, 2018 04:15 | 45m | 5,190 | 3,893 |
| 6 | April 14, 2018 17:45 | April 15, 2018 00:00 | 6h 15m | 4,480 | 7,215 |
| 7 | October 10, 2018 14:45 | October 10, 2018 19:00 | 4h 15m | 4,128 | 5,366 |
| 8 | January 9, 2018 11:15 | January 9, 2018 11:30 | 15m | 3,932 | 983 |
| 9 | November 16, 2018 08:45 | November 16, 2018 10:00 | 1h 15m | 3,673 | 4,582 |
| 10 | August 30, 2018 14:30 | August 30, 2018 15:45 | 1h 15m | 3,290 | 3,156 |
Outage episodes by size in 2018: 146 reached 100+ customers, 37 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 2018, 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 | 2018 | 2.3 hrs | 1.01 | 2.3 hrs | 1.00 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 91% of Idaho's customers in 2018; 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, 2018, 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/2018/idaho/ada-county