County annual report · FIPS 47139
2025 Polk County, TN Power Outage Report
In 2025, customers in Polk County, TN went without power for an average of 8.3 hours, a total of 81K customer-hours (Tennessee average 4.3 hours). That ranks 13th worst of 81 Tennessee counties and 978th 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 Polk 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 | March 15, 2025 12:45 | March 15, 2025 15:30 | 2h 45m | 2,627 | 2,632 |
| 2 | March 26, 2025 14:15 | March 26, 2025 19:30 | 5h 15m | 2,617 | 1,315 |
| 3 | March 4, 2025 21:00 | March 6, 2025 10:15 | 1d 13h | 1,998 | 20K |
| 4 | June 18, 2025 20:00 | June 19, 2025 04:00 | 8h | 1,623 | 1,162 |
| 5 | August 23, 2025 01:45 | August 23, 2025 07:30 | 5h 45m | 1,437 | 7,528 |
| 6 | May 17, 2025 09:45 | May 17, 2025 11:30 | 1h 45m | 1,007 | 1,239 |
| 7 | April 30, 2025 14:00 | April 30, 2025 21:00 | 7h | 979 | 1,952 |
| 8 | December 10, 2025 17:00 | December 10, 2025 19:30 | 2h 30m | 778 | 401 |
| 9 | December 12, 2025 17:00 | December 12, 2025 18:30 | 1h 30m | 774 | 581 |
| 10 | November 19, 2025 15:45 | November 19, 2025 17:15 | 1h 30m | 772 | 392 |
Outage episodes by size in 2025: 54 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 Polk 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 |
|---|---|---|---|---|---|
| Volunteer Electric Coop | 2024 | 11.4 hrs | 5.80 | 7.3 hrs | 5.02 |
| Fort Loudoun Electric Coop | 2024 | 7.9 hrs | 2.85 | 6.4 hrs | 2.60 |
| Tri-State Electric 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 n/a of Tennessee's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 9,762 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. Polk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Polk 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/polk-county