County annual report · FIPS 47115
2025 Marion County, TN Power Outage Report
In 2025, customers in Marion County, TN went without power for an average of 12.0 hours, a total of 188K customer-hours (Tennessee average 4.3 hours). That ranks 6th worst of 81 Tennessee counties and 655th of 3,000 nationally.
Compared with TN, the US and 2024
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Marion County, 2025
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 19, 2025 12:15 | May 19, 2025 20:30 | 8h 15m | 7,277 | 42K |
| 2 | May 29, 2025 18:00 | May 30, 2025 22:30 | 1d 4h | 4,967 | 7,075 |
| 3 | December 19, 2025 00:30 | December 20, 2025 00:15 | 23h 45m | 2,421 | 8,103 |
| 4 | August 13, 2025 11:15 | August 15, 2025 14:45 | 2d 3h | 2,044 | 5,746 |
| 5 | April 24, 2025 17:15 | April 25, 2025 02:00 | 8h 45m | 1,940 | 2,101 |
| 6 | April 6, 2025 06:15 | April 13, 2025 16:45 | 7d 10h | 1,431 | 16K |
| 7 | May 25, 2025 12:00 | May 29, 2025 12:45 | 4d | 1,318 | 8,685 |
| 8 | May 20, 2025 10:30 | May 20, 2025 16:00 | 5h 30m | 1,201 | 2,404 |
| 9 | December 29, 2025 07:15 | December 29, 2025 18:45 | 11h 30m | 1,166 | 8,258 |
| 10 | October 29, 2025 15:45 | October 29, 2025 16:30 | 45m | 1,144 | 572 |
Outage episodes by size in 2025: 52 reached 100+ customers, 12 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 2025, 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 | 2024 | 4.6 hrs | 2.46 | 2.7 hrs | 2.08 |
| City of Chattanooga - (TN) | 2021 | 73 min | 0.60 | 59 min | 0.53 |
| Sequachee Valley Electric Coop | 2024 | 5.0 hrs | 3.09 | 4.2 hrs | 2.69 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2025; 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, 2025, 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/2025/tennessee/marion-county