County annual report · FIPS 19181
2021 Warren County, IA Power Outage Report
In 2021, customers in Warren County, IA went without power for an average of 1.8 hours, a total of 44K customer-hours (Iowa average 2.7 hours). That ranks 69th worst of 99 Iowa counties and 2302nd of 2,974 nationally.
Compared with IA, the US and 2020
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Warren 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 | May 21, 2021 17:45 | May 21, 2021 19:15 | 1h 30m | 3,515 | 3,501 |
| 2 | October 13, 2021 11:00 | October 13, 2021 18:45 | 7h 45m | 2,058 | 2,896 |
| 3 | December 27, 2021 04:30 | December 27, 2021 14:30 | 10h | 1,450 | 9,491 |
| 4 | December 16, 2021 00:00 | December 18, 2021 08:00 | 2d 8h | 1,384 | 13K |
| 5 | August 31, 2021 04:45 | August 31, 2021 19:15 | 14h 30m | 1,155 | 7,792 |
| 6 | November 27, 2021 02:00 | November 27, 2021 12:45 | 10h 45m | 565 | 732 |
| 7 | November 12, 2021 02:15 | November 12, 2021 04:00 | 1h 45m | 116 | 203 |
| 8 | June 19, 2021 05:45 | June 19, 2021 07:30 | 1h 45m | 109 | 190 |
| 9 | September 19, 2021 19:00 | September 20, 2021 00:30 | 5h 30m | 107 | 393 |
| 10 | March 28, 2021 06:45 | March 28, 2021 14:30 | 7h 45m | 95 | 178 |
Outage episodes by size in 2021: 9 reached 100+ customers, 5 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 Warren 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2021 | 1.9 hrs | 1.04 | 75 min | 0.74 |
| Indianola Municipal Utilities | 2016 | 29 min | 0.76 | 29 min | 0.76 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Clarke Electric Coop Inc - (IA) | - | - | - | - | - |
| Pella Cooperative Elec Assn | - | - | - | - | - |
| City of Carlisle- (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 91% of Iowa's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 23,806 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. Warren County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Warren County, IA 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/iowa/warren-county