County annual report · FIPS 48319
2021 Mason County, TX Power Outage Report
In 2021, customers in Mason County, TX went without power for an average of 87.3 hours, a total of 246K customer-hours (Texas average 21.0 hours). That ranks 34th worst of 252 Texas counties and 92nd of 2,974 nationally.
Compared with TX, the US and 2020
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Mason 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 | February 11, 2021 20:15 | March 1, 2021 01:30 | 17d 5h | 3,022 | 237K |
| 2 | June 29, 2021 22:15 | June 30, 2021 01:15 | 3h | 595 | 1,683 |
| 3 | May 17, 2021 20:15 | May 18, 2021 00:00 | 3h 45m | 591 | 1,625 |
| 4 | August 30, 2021 21:45 | August 31, 2021 00:45 | 3h | 578 | 1,096 |
| 5 | May 26, 2021 15:00 | May 26, 2021 16:00 | 1h | 508 | 248 |
| 6 | June 19, 2021 15:15 | June 19, 2021 16:45 | 1h 30m | 467 | 237 |
| 7 | October 27, 2021 08:00 | October 27, 2021 13:15 | 5h 15m | 345 | 1,058 |
| 8 | June 14, 2021 16:15 | June 14, 2021 17:30 | 1h 15m | 212 | 265 |
| 9 | May 2, 2021 11:45 | May 2, 2021 18:00 | 6h 15m | 103 | 372 |
| 10 | October 13, 2021 22:45 | October 14, 2021 02:15 | 3h 30m | 101 | 34 |
Outage episodes by size in 2021: 10 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 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 |
|---|---|---|---|---|---|
| Oncor Electric Delivery Company LLC | 2017 | 3.4 hrs | 1.69 | 2.4 hrs | 1.49 |
| AEP Texas North Company | 2021 | 18.9 hrs | 2.72 | 1.9 hrs | 1.24 |
| Pedernales Electric Coop, Inc | 2021 | 2.5 hrs | 1.13 | 84 min | 1.13 |
| Central Texas Elec Coop, Inc | 2021 | 137.5 hrs | 3.94 | 52.5 hrs | 2.54 |
| 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 94% of Texas's customers in 2021; 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, 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/texas/mason-county