County annual report · FIPS 48491
2017 Williamson County, TX Power Outage Report
In 2017, customers in Williamson County, TX went without power for an average of 0.4 hours, a total of 120K customer-hours (Texas average 1.6 hours). That ranks 139th worst of 249 Texas counties and 2355th of 2,786 nationally.
Compared with TX, the US and 2016
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Williamson County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 24, 2017 14:00 | July 25, 2017 06:45 | 16h 45m | 4,245 | 9,502 |
| 2 | June 3, 2017 02:15 | June 3, 2017 03:45 | 1h 30m | 3,839 | 4,800 |
| 3 | August 26, 2017 13:45 | August 29, 2017 10:00 | 2d 20h | 3,482 | 20K |
| 4 | June 24, 2017 16:00 | June 24, 2017 20:00 | 4h | 3,456 | 4,265 |
| 5 | December 3, 2017 14:45 | December 3, 2017 18:00 | 3h 15m | 3,399 | 859 |
| 6 | December 16, 2017 10:30 | December 17, 2017 12:00 | 1d 1h | 3,389 | 4,828 |
| 7 | May 28, 2017 22:45 | May 29, 2017 07:30 | 8h 45m | 2,726 | 1,906 |
| 8 | December 6, 2017 02:15 | December 6, 2017 07:30 | 5h 15m | 2,528 | 1,649 |
| 9 | October 29, 2017 18:30 | October 29, 2017 18:45 | 15m | 2,457 | 614 |
| 10 | May 9, 2017 22:45 | May 9, 2017 23:00 | 15m | 2,154 | 539 |
Outage episodes by size in 2017: 86 reached 100+ customers, 30 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 Williamson County reported on EIA Form 861 for 2017, 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 | 2017 | 71 min | 0.67 | 71 min | 0.67 |
| Bluebonnet Electric Coop, Inc | 2017 | 2.6 hrs | 1.31 | 1.7 hrs | 1.11 |
| Bartlett Electric Coop, Inc | 2017 | 2.7 hrs | 1.23 | 48 min | 0.65 |
| Austin Energy | 2017 | 2.3 hrs | 1.02 | 63 min | 0.85 |
| 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 n/a of Texas's customers in 2017; 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, 2017, 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/2017/texas/williamson-county