County annual report · FIPS 47001
2021 Anderson County, TN Power Outage Report
In 2021, customers in Anderson County, TN went without power for an average of 1.0 hours, a total of 45K customer-hours (Tennessee average 3.7 hours). That ranks 63rd worst of 84 Tennessee counties and 2643rd 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 Anderson 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 | January 26, 2021 11:15 | January 26, 2021 16:45 | 5h 30m | 5,253 | 2,634 |
| 2 | January 22, 2021 21:15 | January 22, 2021 22:15 | 1h | 5,250 | 1,441 |
| 3 | June 28, 2021 12:45 | June 29, 2021 08:45 | 20h | 1,537 | 3,588 |
| 4 | June 29, 2021 10:15 | June 29, 2021 14:15 | 4h | 1,257 | 340 |
| 5 | October 22, 2021 15:30 | October 22, 2021 15:45 | 15m | 1,248 | 312 |
| 6 | July 24, 2021 18:00 | July 24, 2021 18:15 | 15m | 1,007 | 252 |
| 7 | August 17, 2021 16:15 | August 18, 2021 03:00 | 10h 45m | 985 | 656 |
| 8 | June 30, 2021 17:30 | June 30, 2021 19:00 | 1h 30m | 979 | 246 |
| 9 | February 19, 2021 22:45 | February 19, 2021 23:00 | 15m | 905 | 226 |
| 10 | September 16, 2021 20:30 | September 16, 2021 21:45 | 1h 15m | 839 | 420 |
Outage episodes by size in 2021: 59 reached 100+ customers, 6 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 Anderson 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 |
|---|---|---|---|---|---|
| Knoxville Utilities Board | 2021 | 2.4 hrs | - | 1.9 hrs | - |
| City of Clinton - (TN) | 2021 | 2.1 hrs | 1.53 | 1.7 hrs | 1.32 |
| City of Oak Ridge | - | - | - | - | - |
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 ÷ 42,752 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. Anderson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Anderson 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/anderson-county