County annual report · FIPS 47021
2021 Cheatham County, TN Power Outage Report
In 2021, customers in Cheatham County, TN went without power for an average of 4.7 hours, a total of 73K customer-hours (Tennessee average 3.7 hours). That ranks 31st worst of 84 Tennessee counties and 1389th 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 Cheatham 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 | May 6, 2021 22:00 | May 8, 2021 00:45 | 1d 2h | 2,038 | 5,020 |
| 2 | December 6, 2021 04:45 | December 6, 2021 08:30 | 3h 45m | 1,878 | 3,419 |
| 3 | May 4, 2021 10:45 | May 4, 2021 18:45 | 8h | 1,732 | 2,685 |
| 4 | January 25, 2021 23:00 | January 25, 2021 23:45 | 45m | 1,714 | 1,286 |
| 5 | June 27, 2021 11:30 | June 27, 2021 20:15 | 8h 45m | 1,455 | 465 |
| 6 | July 16, 2021 14:30 | July 17, 2021 02:00 | 11h 30m | 1,446 | 1,394 |
| 7 | May 3, 2021 05:30 | May 3, 2021 10:30 | 5h | 1,444 | 3,024 |
| 8 | December 20, 2021 14:30 | December 20, 2021 21:15 | 6h 45m | 1,437 | 928 |
| 9 | January 3, 2021 14:15 | January 3, 2021 18:00 | 3h 45m | 1,434 | 1,465 |
| 10 | March 10, 2021 16:00 | March 10, 2021 17:45 | 1h 45m | 1,426 | 1,093 |
Outage episodes by size in 2021: 45 reached 100+ customers, 10 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 Cheatham 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 |
|---|---|---|---|---|---|
| Middle Tennessee E M C | 2021 | 65 min | 1.00 | 55 min | 0.96 |
| City of Dickson | 2021 | 12.0 hrs | 6.34 | 5.6 hrs | 4.62 |
| Nashville Electric Service | 2021 | 12.8 hrs | 1.82 | 1.7 hrs | 1.27 |
| Cumberland Elec Member Corp | - | - | - | - | - |
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 ÷ 15,430 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. Cheatham County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cheatham 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/cheatham-county