County annual report · FIPS 05071
2021 Johnson County, AR Power Outage Report
In 2021, customers in Johnson County, AR went without power for an average of 3.4 hours, a total of 63K customer-hours (Arkansas average 5.4 hours). That ranks 58th worst of 75 Arkansas counties and 1719th of 2,974 nationally.
Compared with AR, the US and 2020
Coverage line is EAGLE-I's share of Arkansas 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 | April 29, 2021 02:00 | April 29, 2021 16:15 | 14h 15m | 1,672 | 4,845 |
| 2 | February 16, 2021 12:00 | February 17, 2021 19:00 | 1d 7h | 1,564 | 26K |
| 3 | April 24, 2021 20:15 | April 24, 2021 23:00 | 2h 45m | 1,198 | 3,124 |
| 4 | September 22, 2021 14:15 | September 22, 2021 18:15 | 4h | 1,092 | 1,705 |
| 5 | July 22, 2021 22:15 | July 23, 2021 00:00 | 1h 45m | 1,085 | 1,509 |
| 6 | December 18, 2021 04:30 | December 18, 2021 06:15 | 1h 45m | 928 | 1,624 |
| 7 | July 25, 2021 16:45 | July 25, 2021 19:30 | 2h 45m | 823 | 625 |
| 8 | January 29, 2021 16:15 | January 29, 2021 17:00 | 45m | 822 | 617 |
| 9 | January 8, 2021 19:00 | January 8, 2021 20:15 | 1h 15m | 821 | 426 |
| 10 | February 28, 2021 17:45 | February 28, 2021 22:30 | 4h 45m | 704 | 1,936 |
Outage episodes by size in 2021: 34 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 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 |
|---|---|---|---|---|---|
| Entergy Arkansas LLC | 2021 | 6.4 hrs | 1.76 | 4.4 hrs | 1.51 |
| Arkansas Valley Elec Coop Corp | 2021 | 6.0 hrs | 2.06 | 2.8 hrs | 1.88 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| Clarksville Connected Utilities | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 86% of Arkansas's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,727 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, AR 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/arkansas/johnson-county