County annual report · FIPS 48491
2022 Williamson County, TX Power Outage Report
In 2022, customers in Williamson County, TX went without power for an average of 3.6 hours, a total of 1.1M customer-hours (Texas average 4.0 hours). That ranks 179th worst of 252 Texas counties and 1753rd of 2,976 nationally.
Compared with TX, the US and 2021
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Williamson County, 2022
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 21, 2022 09:00 | March 24, 2022 09:45 | 3d | 22,258 | 228K |
| 2 | May 25, 2022 00:45 | May 26, 2022 11:15 | 1d 10h | 13,479 | 59K |
| 3 | June 27, 2022 10:30 | June 29, 2022 07:15 | 1d 20h | 10,212 | 46K |
| 4 | February 9, 2022 13:45 | February 9, 2022 17:00 | 3h 15m | 9,781 | 4,792 |
| 5 | October 25, 2022 01:30 | October 27, 2022 01:15 | 1d 23h | 9,294 | 85K |
| 6 | July 7, 2022 13:15 | July 9, 2022 05:00 | 1d 15h | 8,417 | 4,398 |
| 7 | November 24, 2022 11:00 | November 24, 2022 22:15 | 11h 15m | 7,744 | 14K |
| 8 | November 26, 2022 05:45 | November 27, 2022 10:15 | 1d 4h | 7,594 | 22K |
| 9 | May 5, 2022 06:00 | May 7, 2022 04:15 | 1d 22h | 6,881 | 17K |
| 10 | August 14, 2022 03:45 | August 14, 2022 08:30 | 4h 45m | 6,663 | 7,776 |
Outage episodes by size in 2022: 238 reached 100+ customers, 111 reached 1,000+ customers, 3 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 Williamson County reported on EIA Form 861 for 2022, 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 |
| Pedernales Electric Coop, Inc | 2022 | 81 min | 1.18 | 81 min | 1.18 |
| Bluebonnet Electric Coop, Inc | 2022 | 2.4 hrs | 1.27 | 1.7 hrs | 1.06 |
| Bartlett Electric Coop, Inc | 2022 | 4.4 hrs | 1.33 | 1.9 hrs | 1.15 |
| Austin Energy | 2022 | 85 min | 0.96 | 68 min | 0.87 |
| City of Bartlett - (TX) | - | - | - | - | - |
| City of Georgetown - (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 93% of Texas's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 299,583 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. Williamson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Williamson County, TX annual power outage report, 2022, 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/2022/texas/williamson-county