County annual report · FIPS 48397
2020 Rockwall County, TX Power Outage Report
In 2020, customers in Rockwall County, TX went without power for an average of 1.8 hours, a total of 137K customer-hours (Texas average 5.3 hours). That ranks 226th worst of 254 Texas counties and 2346th of 3,019 nationally.
Compared with TX, the US and 2019
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Rockwall County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 9, 2020 22:00 | September 10, 2020 07:45 | 9h 45m | 4,272 | 3,060 |
| 2 | February 12, 2020 16:00 | February 12, 2020 18:15 | 2h 15m | 4,193 | 2,984 |
| 3 | January 10, 2020 14:30 | January 11, 2020 01:00 | 10h 30m | 3,535 | 6,305 |
| 4 | July 21, 2020 14:30 | July 22, 2020 07:15 | 16h 45m | 3,495 | 8,943 |
| 5 | February 13, 2020 15:15 | February 14, 2020 01:15 | 10h | 2,876 | 777 |
| 6 | September 29, 2020 16:45 | September 29, 2020 23:45 | 7h | 2,739 | 3,912 |
| 7 | May 20, 2020 13:45 | May 20, 2020 22:15 | 8h 30m | 2,681 | 3,131 |
| 8 | June 10, 2020 02:45 | June 11, 2020 06:45 | 1d 4h | 2,659 | 5,411 |
| 9 | February 29, 2020 22:00 | March 1, 2020 00:30 | 2h 30m | 2,625 | 3,929 |
| 10 | March 1, 2020 15:45 | March 2, 2020 04:30 | 12h 45m | 2,623 | 5,942 |
Outage episodes by size in 2020: 70 reached 100+ customers, 24 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 2020, 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) | 2020 | 74 min | 1.03 | 60 min | 0.94 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 63% of Texas's customers in 2020; 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, 2020, 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/2020/texas/rockwall-county