County annual report · FIPS 19161
2023 Sac County, IA Power Outage Report
In 2023, customers in Sac County, IA went without power for an average of 0.8 hours, a total of 3,144 customer-hours (Iowa average 2.0 hours). That ranks 85th worst of 99 Iowa counties and 2731st of 2,977 nationally.
Compared with IA, the US and 2022
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Sac County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 23, 2023 17:15 | September 23, 2023 20:45 | 3h 30m | 492 | 153 |
| 2 | August 6, 2023 03:00 | August 6, 2023 13:15 | 10h 15m | 451 | 858 |
| 3 | January 3, 2023 02:00 | January 3, 2023 05:45 | 3h 45m | 242 | 556 |
| 4 | May 17, 2023 02:45 | May 17, 2023 03:30 | 45m | 154 | 116 |
| 5 | May 21, 2023 19:15 | May 21, 2023 21:30 | 2h 15m | 128 | 286 |
| 6 | May 2, 2023 01:15 | May 2, 2023 06:15 | 5h | 107 | 44 |
| 7 | August 11, 2023 23:45 | August 12, 2023 05:00 | 5h 15m | 88 | 241 |
| 8 | May 5, 2023 20:15 | May 5, 2023 22:00 | 1h 45m | 61 | 77 |
| 9 | May 7, 2023 14:00 | May 7, 2023 15:30 | 1h 30m | 59 | 89 |
| 10 | February 25, 2023 16:30 | February 25, 2023 18:15 | 1h 45m | 33 | 58 |
Outage episodes by size in 2023: 6 reached 100+ customers, 0 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 Sac County reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2023 | 2.8 hrs | 1.13 | 78 min | 0.83 |
| Iowa Lakes Electric Coop | 2023 | 52 min | 0.51 | 52 min | 0.51 |
| Western Iowa Power Coop | 2018 | 47 min | 0.76 | 47 min | 0.76 |
| North West Rural Electric Coop | - | - | - | - | - |
| Raccoon Valley Electric Cooperative | - | - | - | - | - |
| Calhoun County Elec Coop Assn | - | - | - | - | - |
| City of Auburn - (IA) | - | - | - | - | - |
| City of Lake View - (IA) | - | - | - | - | - |
| City of Wall Lake - (IA) | - | - | - | - | - |
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 Iowa's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,895 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. Sac County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sac County, IA annual power outage report, 2023, 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/2023/iowa/sac-county