County annual report · FIPS 47023
2021 Chester County, TN Power Outage Report
In 2021, customers in Chester County, TN went without power for an average of 7.5 hours, a total of 44K customer-hours (Tennessee average 3.7 hours). That ranks 13th worst of 84 Tennessee counties and 985th of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Chester 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 | August 18, 2021 16:00 | August 18, 2021 17:30 | 1h 30m | 4,411 | 3,309 |
| 2 | May 6, 2021 21:15 | May 7, 2021 15:15 | 18h | 2,808 | 9,867 |
| 3 | August 1, 2021 04:00 | August 1, 2021 16:15 | 12h 15m | 1,677 | 2,810 |
| 4 | July 3, 2021 22:00 | July 4, 2021 00:45 | 2h 45m | 1,371 | 2,104 |
| 5 | March 22, 2021 01:30 | March 22, 2021 02:30 | 1h | 1,370 | 686 |
| 6 | July 21, 2021 15:45 | July 21, 2021 16:15 | 30m | 1,253 | 331 |
| 7 | December 11, 2021 07:30 | December 12, 2021 00:00 | 16h 30m | 1,206 | 6,316 |
| 8 | August 19, 2021 04:15 | August 19, 2021 04:30 | 15m | 1,190 | 298 |
| 9 | April 11, 2021 17:15 | April 11, 2021 20:00 | 2h 45m | 902 | 2,031 |
| 10 | March 27, 2021 21:45 | March 28, 2021 12:45 | 15h | 805 | 3,242 |
Outage episodes by size in 2021: 29 reached 100+ customers, 8 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 Chester 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 |
|---|---|---|---|---|---|
| Southwest Tennessee E M C | - | - | - | - | - |
| Pickwick Electric Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,853 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. Chester County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Chester County, TN 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/). https://massoutage.com/reports/2021/tennessee/chester-county