County annual report · FIPS 47011
2021 Bradley County, TN Power Outage Report
In 2021, customers in Bradley County, TN went without power for an average of 7.3 hours, a total of 400K customer-hours (Tennessee average 3.7 hours). That ranks 16th worst of 84 Tennessee counties and 999th 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 Bradley 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 | June 13, 2021 00:00 | June 15, 2021 16:00 | 2d 16h | 8,475 | 51K |
| 2 | July 25, 2021 16:45 | July 26, 2021 05:30 | 12h 45m | 5,312 | 7,560 |
| 3 | May 4, 2021 14:30 | May 7, 2021 13:15 | 2d 22h | 3,844 | 45K |
| 4 | December 11, 2021 13:15 | December 12, 2021 05:30 | 16h 15m | 2,973 | 8,978 |
| 5 | December 1, 2021 13:00 | December 2, 2021 02:15 | 13h 15m | 2,849 | 7,823 |
| 6 | May 26, 2021 12:45 | May 27, 2021 19:15 | 1d 6h | 2,819 | 7,566 |
| 7 | August 18, 2021 19:00 | August 20, 2021 00:15 | 1d 5h | 2,470 | 5,423 |
| 8 | November 17, 2021 18:15 | November 17, 2021 20:00 | 1h 45m | 2,278 | 826 |
| 9 | June 23, 2021 12:30 | June 23, 2021 19:45 | 7h 15m | 2,273 | 1,742 |
| 10 | October 21, 2021 23:30 | October 23, 2021 22:30 | 1d 23h | 2,209 | 9,777 |
Outage episodes by size in 2021: 131 reached 100+ customers, 48 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 Bradley 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 |
|---|---|---|---|---|---|
| Volunteer Electric Coop | 2021 | 8.6 hrs | 5.13 | 5.3 hrs | 4.64 |
| City of Chattanooga - (TN) | 2021 | 73 min | 0.60 | 59 min | 0.53 |
| City of Cleveland - (TN) | 2021 | 88 min | 1.28 | 64 min | 1.10 |
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 ÷ 54,499 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. Bradley County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Bradley 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/tennessee/bradley-county