County annual report · FIPS 19161
2024 Sac County, IA Power Outage Report
In 2024, customers in Sac County, IA went without power for an average of 6.5 hours, a total of 25K customer-hours (Iowa average 3.2 hours). That ranks 16th worst of 99 Iowa counties and 1334th of 2,990 nationally.
Compared with IA, the US and 2023
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Sac County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 7, 2024 18:45 | May 7, 2024 20:15 | 1h 30m | 1,282 | 1,906 |
| 2 | May 8, 2024 03:15 | May 8, 2024 04:00 | 45m | 1,281 | 960 |
| 3 | October 2, 2024 05:45 | October 2, 2024 08:30 | 2h 45m | 1,210 | 2,725 |
| 4 | July 30, 2024 06:00 | July 30, 2024 19:30 | 13h 30m | 789 | 2,304 |
| 5 | June 7, 2024 14:15 | June 8, 2024 02:30 | 12h 15m | 757 | 6,005 |
| 6 | July 15, 2024 20:30 | July 16, 2024 02:15 | 5h 45m | 755 | 1,505 |
| 7 | June 16, 2024 06:45 | June 17, 2024 01:30 | 18h 45m | 754 | 5,920 |
| 8 | April 14, 2024 19:15 | April 14, 2024 19:30 | 15m | 479 | 120 |
| 9 | October 24, 2024 14:15 | October 24, 2024 16:15 | 2h | 477 | 479 |
| 10 | November 4, 2024 13:30 | November 4, 2024 15:00 | 1h 30m | 477 | 546 |
Outage episodes by size in 2024: 13 reached 100+ customers, 3 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 2024, 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 | 2024 | 5.5 hrs | 1.42 | 1.7 hrs | 0.94 |
| Iowa Lakes Electric Coop | 2024 | 45 min | 0.48 | 45 min | 0.48 |
| 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 2024; 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, 2024, 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/2024/iowa/sac-county