County annual report · FIPS 20091
2021 Johnson County, KS Power Outage Report
In 2021, customers in Johnson County, KS went without power for an average of 2.6 hours, a total of 763K customer-hours (Kansas average 4.0 hours). That ranks 67th worst of 94 Kansas counties and 2010th of 2,974 nationally.
Compared with KS, the US and 2020
Coverage line is EAGLE-I's share of Kansas customers tracked each year.
Biggest outages in Johnson 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 | February 16, 2021 09:30 | February 23, 2021 04:15 | 6d 18h | 32,907 | 122K |
| 2 | December 15, 2021 13:00 | December 19, 2021 00:00 | 3d 11h | 13,378 | 106K |
| 3 | June 10, 2021 11:45 | June 13, 2021 08:30 | 2d 20h | 12,438 | 45K |
| 4 | February 15, 2021 03:30 | February 16, 2021 06:00 | 1d 2h | 10,671 | 6,064 |
| 5 | August 11, 2021 15:15 | August 14, 2021 22:00 | 3d 6h | 8,269 | 63K |
| 6 | April 22, 2021 13:00 | April 23, 2021 01:30 | 12h 30m | 8,158 | 4,797 |
| 7 | August 20, 2021 19:45 | August 25, 2021 07:30 | 4d 11h | 5,588 | 62K |
| 8 | July 27, 2021 13:15 | July 28, 2021 06:30 | 17h 15m | 4,381 | 7,617 |
| 9 | April 7, 2021 08:15 | April 8, 2021 00:45 | 16h 30m | 4,296 | 9,249 |
| 10 | September 3, 2021 08:45 | September 5, 2021 02:00 | 1d 17h | 3,785 | 11K |
Outage episodes by size in 2021: 198 reached 100+ customers, 59 reached 1,000+ customers, 4 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 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 |
|---|---|---|---|---|---|
| Evergy Metro | 2021 | 4.0 hrs | 1.57 | 1.6 hrs | 0.94 |
| Evergy Kansas Central, Inc | 2021 | 5.8 hrs | 1.68 | 1.7 hrs | 1.02 |
| City of Gardner - (KS) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 80% of Kansas's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 296,663 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, KS 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/kansas/johnson-county