County annual report · FIPS 19103
2022 Johnson County, IA Power Outage Report
In 2022, customers in Johnson County, IA went without power for an average of 1.5 hours, a total of 118K customer-hours (Iowa average 1.6 hours). That ranks 61st worst of 99 Iowa counties and 2499th of 2,976 nationally.
Compared with IA, the US and 2021
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Johnson County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 12, 2022 17:15 | January 12, 2022 21:00 | 3h 45m | 6,548 | 3,033 |
| 2 | July 1, 2022 10:45 | July 1, 2022 17:00 | 6h 15m | 5,789 | 4,003 |
| 3 | December 14, 2022 15:30 | December 15, 2022 01:15 | 9h 45m | 5,492 | 4,150 |
| 4 | June 28, 2022 13:00 | June 29, 2022 00:45 | 11h 45m | 4,645 | 3,079 |
| 5 | September 21, 2022 04:00 | September 21, 2022 09:00 | 5h | 3,534 | 6,034 |
| 6 | January 22, 2022 08:15 | January 22, 2022 10:15 | 2h | 3,357 | 6,264 |
| 7 | May 28, 2022 19:00 | May 31, 2022 05:30 | 2d 10h | 2,438 | 4,769 |
| 8 | January 14, 2022 16:30 | January 14, 2022 18:30 | 2h | 1,943 | 3,556 |
| 9 | April 23, 2022 23:15 | April 24, 2022 00:45 | 1h 30m | 1,465 | 1,167 |
| 10 | April 23, 2022 18:45 | April 23, 2022 20:15 | 1h 30m | 1,440 | 815 |
Outage episodes by size in 2022: 95 reached 100+ customers, 14 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 Johnson County reported on EIA Form 861 for 2022, 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 | 2022 | 1.8 hrs | 1.03 | 87 min | 0.88 |
| Eastern Iowa Light & Power Coop | 2022 | 80 min | 1.01 | 80 min | 1.01 |
| East-Central Iowa Rural Elec Coop | 2022 | 57 min | 0.90 | 57 min | 0.90 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Linn County REC | 2022 | 1.9 hrs | 1.59 | 1.9 hrs | 1.59 |
| Farmers Electric Coop - (IA) | 2018 | 77 min | 2.30 | 77 min | 2.30 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
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 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 77,769 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. Johnson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, IA annual power outage report, 2022, 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/2022/iowa/johnson-county