County annual report · FIPS 48319
2025 Mason County, TX Power Outage Report
In 2025, customers in Mason County, TX went without power for an average of 5.2 hours, a total of 15K customer-hours (Texas average 4.6 hours). That ranks 176th worst of 254 Texas counties and 1443rd of 3,000 nationally.
Compared with TX, the US and 2024
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Mason 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 | December 18, 2025 13:45 | December 18, 2025 15:45 | 2h | 2,798 | 702 |
| 2 | May 26, 2025 20:15 | May 30, 2025 21:15 | 4d 1h | 696 | 2,680 |
| 3 | October 17, 2025 13:30 | October 17, 2025 18:15 | 4h 45m | 624 | 245 |
| 4 | July 4, 2025 07:45 | July 5, 2025 20:30 | 1d 12h | 483 | 1,003 |
| 5 | November 20, 2025 07:45 | November 20, 2025 11:30 | 3h 45m | 482 | 1,689 |
| 6 | January 20, 2025 08:45 | January 20, 2025 13:45 | 5h | 255 | 675 |
| 7 | March 20, 2025 23:30 | March 21, 2025 00:45 | 1h 15m | 233 | 291 |
| 8 | May 23, 2025 04:00 | May 23, 2025 11:00 | 7h | 200 | 602 |
| 9 | December 8, 2025 15:15 | December 8, 2025 17:30 | 2h 15m | 182 | 384 |
| 10 | June 11, 2025 23:45 | June 12, 2025 06:30 | 6h 45m | 128 | 135 |
Outage episodes by size in 2025: 13 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 Mason 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 |
|---|---|---|---|---|---|
| Oncor Electric Delivery Company LLC | 2017 | 3.4 hrs | 1.69 | 2.4 hrs | 1.49 |
| AEP Texas North Company | 2024 | 1.8 hrs | 1.15 | 1.7 hrs | 1.13 |
| Pedernales Electric Coop, Inc | 2024 | 57 min | 0.79 | 57 min | 0.79 |
| Central Texas Elec Coop, Inc | 2024 | 2.4 hrs | 1.90 | 2.2 hrs | 1.67 |
| City of Mason - (TX) | - | - | - | - | - |
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 Texas's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,818 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. Mason County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Mason County, TX 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/texas/mason-county