County annual report · FIPS 13167
2021 Johnson County, GA Power Outage Report
In 2021, customers in Johnson County, GA went without power for an average of 8.2 hours, a total of 37K customer-hours (Georgia average 2.4 hours). That ranks 7th worst of 159 Georgia counties and 921st of 2,974 nationally.
Compared with GA, the US and 2020
Coverage line is EAGLE-I's share of Georgia 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 24, 2021 12:45 | April 24, 2021 16:15 | 3h 30m | 983 | 2,731 |
| 2 | February 13, 2021 14:30 | February 14, 2021 15:00 | 1d | 830 | 20K |
| 3 | May 20, 2021 22:00 | May 20, 2021 23:15 | 1h 15m | 828 | 1,028 |
| 4 | August 18, 2021 18:45 | August 18, 2021 22:00 | 3h 15m | 472 | 477 |
| 5 | September 7, 2021 19:15 | September 7, 2021 20:45 | 1h 30m | 387 | 389 |
| 6 | December 11, 2021 23:00 | December 12, 2021 03:45 | 4h 45m | 342 | 851 |
| 7 | March 31, 2021 22:15 | April 1, 2021 02:15 | 4h | 271 | 948 |
| 8 | August 22, 2021 15:00 | August 22, 2021 19:45 | 4h 45m | 270 | 1,212 |
| 9 | March 18, 2021 12:00 | March 18, 2021 19:15 | 7h 15m | 260 | 1,030 |
| 10 | June 11, 2021 20:15 | June 12, 2021 04:30 | 8h 15m | 251 | 686 |
Outage episodes by size in 2021: 15 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 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 |
|---|---|---|---|---|---|
| Georgia Power Co | 2021 | 2.4 hrs | 1.28 | 2.4 hrs | 1.25 |
| Jefferson Electric Member Corp | 2021 | 56 min | 0.84 | 56 min | 0.84 |
| Washington Elec Member Corp | 2021 | 4.0 hrs | - | 4.0 hrs | - |
| Altamaha Electric Member Corp | 2021 | 2.9 hrs | 1.71 | 2.7 hrs | 1.68 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Georgia's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,550 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, GA 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/georgia/johnson-county