County annual report · FIPS 19039
2023 Clarke County, IA Power Outage Report
In 2023, customers in Clarke County, IA went without power for an average of 1.7 hours, a total of 7,082 customer-hours (Iowa average 2.0 hours). That ranks 51st worst of 99 Iowa counties and 2425th 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 Clarke 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 | October 7, 2023 16:15 | October 7, 2023 16:45 | 30m | 611 | 306 |
| 2 | August 13, 2023 07:15 | August 14, 2023 12:00 | 1d 4h | 507 | 2,080 |
| 3 | July 30, 2023 00:15 | July 31, 2023 14:15 | 1d 14h | 251 | 407 |
| 4 | April 15, 2023 21:45 | April 15, 2023 23:15 | 1h 30m | 149 | 224 |
| 5 | January 1, 2023 11:30 | January 1, 2023 19:15 | 7h 45m | 130 | 87 |
| 6 | September 7, 2023 17:15 | September 7, 2023 18:00 | 45m | 119 | 60 |
| 7 | August 1, 2023 13:45 | August 1, 2023 14:00 | 15m | 115 | 29 |
| 8 | August 1, 2023 19:00 | August 1, 2023 19:45 | 45m | 100 | 75 |
| 9 | June 17, 2023 00:00 | June 18, 2023 08:45 | 1d 8h | 91 | 681 |
| 10 | April 20, 2023 04:15 | April 20, 2023 12:15 | 8h | 90 | 667 |
Outage episodes by size in 2023: 8 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 Clarke 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 |
|---|---|---|---|---|---|
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Clarke Electric Coop Inc - (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 ÷ 4,290 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. Clarke County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clarke 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/). https://massoutage.com/reports/2023/iowa/clarke-county