County annual report · FIPS 47115
2021 Marion County, TN Power Outage Report
In 2021, customers in Marion County, TN went without power for an average of 1.7 hours, a total of 26K customer-hours (Tennessee average 3.7 hours). That ranks 53rd worst of 84 Tennessee counties and 2378th 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 Marion 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 | September 20, 2021 17:30 | September 21, 2021 02:15 | 8h 45m | 9,922 | 5,671 |
| 2 | May 29, 2021 08:30 | May 29, 2021 16:30 | 8h | 747 | 528 |
| 3 | May 1, 2021 00:15 | May 1, 2021 13:30 | 13h 15m | 688 | 185 |
| 4 | August 31, 2021 04:30 | August 31, 2021 15:45 | 11h 15m | 634 | 357 |
| 5 | April 1, 2021 12:45 | April 1, 2021 22:00 | 9h 15m | 550 | 423 |
| 6 | October 19, 2021 03:30 | October 19, 2021 17:45 | 14h 15m | 515 | 1,384 |
| 7 | March 26, 2021 11:45 | March 26, 2021 18:30 | 6h 45m | 509 | 278 |
| 8 | June 23, 2021 22:45 | June 24, 2021 01:15 | 2h 30m | 442 | 1,105 |
| 9 | April 8, 2021 18:00 | April 9, 2021 13:30 | 19h 30m | 333 | 1,250 |
| 10 | March 1, 2021 05:45 | March 1, 2021 10:15 | 4h 30m | 251 | 382 |
Outage episodes by size in 2021: 24 reached 100+ customers, 1 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 Marion 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 |
|---|---|---|---|---|---|
| Duck River Elec Member Corp | 2021 | 7.7 hrs | 2.06 | 2.2 hrs | 1.59 |
| City of Chattanooga - (TN) | 2021 | 73 min | 0.60 | 59 min | 0.53 |
| Sequachee Valley Electric Coop | 2021 | 5.8 hrs | 3.71 | 4.5 hrs | 3.34 |
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 ÷ 15,729 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. Marion County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Marion 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/marion-county