County annual report · FIPS 47125
2025 Montgomery County, TN Power Outage Report
In 2025, customers in Montgomery County, TN went without power for an average of 2.8 hours, a total of 337K customer-hours (Tennessee average 4.3 hours). That ranks 51st worst of 81 Tennessee counties and 2131st 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 Montgomery 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 21, 2025 16:00 | May 28, 2025 21:45 | 7d 5h | 83,206 | 41K |
| 2 | June 27, 2025 18:00 | June 28, 2025 01:00 | 7h | 8,478 | 9,496 |
| 3 | April 3, 2025 04:30 | April 5, 2025 01:45 | 1d 21h | 7,954 | 31K |
| 4 | July 25, 2025 16:15 | July 25, 2025 21:00 | 4h 45m | 7,405 | 4,285 |
| 5 | May 16, 2025 13:00 | May 16, 2025 23:45 | 10h 45m | 6,065 | 17K |
| 6 | May 17, 2025 01:15 | May 18, 2025 02:00 | 1d | 6,063 | 25K |
| 7 | May 20, 2025 12:45 | May 20, 2025 20:15 | 7h 30m | 3,931 | 2,177 |
| 8 | June 6, 2025 19:00 | June 7, 2025 04:00 | 9h | 3,885 | 4,140 |
| 9 | July 18, 2025 22:45 | July 20, 2025 02:15 | 1d 3h | 3,868 | 9,450 |
| 10 | May 3, 2025 08:30 | May 3, 2025 20:45 | 12h 15m | 3,443 | 9,647 |
Outage episodes by size in 2025: 161 reached 100+ customers, 50 reached 1,000+ customers, 1 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 Montgomery 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 |
|---|---|---|---|---|---|
| City of Dickson | 2024 | 5.2 hrs | 3.39 | 4.8 hrs | 3.26 |
| City of Clarksville - (TN) | 2024 | 3.4 hrs | 2.16 | 1.7 hrs | 1.83 |
| 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 n/a of Tennessee's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 119,925 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery 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/montgomery-county