County annual report · FIPS 48397
2019 Rockwall County, TX Power Outage Report
In 2019, customers in Rockwall County, TX went without power for an average of 2.0 hours, a total of 156K customer-hours (Texas average 4.9 hours). That ranks 218th worst of 254 Texas counties and 2044th of 2,945 nationally.
Compared with TX, the US and 2018
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Rockwall County, 2019
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 13, 2019 10:30 | March 14, 2019 23:00 | 1d 12h | 5,193 | 8,961 |
| 2 | October 21, 2019 03:00 | October 23, 2019 16:30 | 2d 13h | 4,541 | 34K |
| 3 | April 13, 2019 15:30 | April 14, 2019 17:15 | 1d 1h | 3,889 | 14K |
| 4 | December 19, 2019 16:45 | December 19, 2019 17:45 | 1h | 2,466 | 640 |
| 5 | September 9, 2019 10:00 | September 9, 2019 16:15 | 6h 15m | 2,453 | 811 |
| 6 | January 30, 2019 15:30 | January 31, 2019 02:00 | 10h 30m | 2,440 | 1,931 |
| 7 | August 28, 2019 18:30 | August 29, 2019 01:00 | 6h 30m | 2,435 | 3,065 |
| 8 | January 19, 2019 08:00 | January 19, 2019 08:30 | 30m | 2,370 | 594 |
| 9 | October 15, 2019 06:15 | October 15, 2019 22:00 | 15h 45m | 2,338 | 2,971 |
| 10 | July 18, 2019 14:45 | July 18, 2019 15:15 | 30m | 2,121 | 531 |
Outage episodes by size in 2019: 56 reached 100+ customers, 17 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 Rockwall County reported on EIA Form 861 for 2019, 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 |
| Farmers Electric Coop, Inc - (TX) | 2018 | 84 min | 1.19 | 84 min | 1.19 |
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 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 77,029 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. Rockwall County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Rockwall County, TX annual power outage report, 2019, 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/2019/texas/rockwall-county