County annual report · FIPS 48397
2018 Rockwall County, TX Power Outage Report
In 2018, customers in Rockwall County, TX went without power for an average of 1.6 hours, a total of 126K customer-hours (Texas average 2.4 hours). That ranks 203rd worst of 253 Texas counties and 2029th of 2,798 nationally.
Compared with TX, the US and 2017
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Rockwall County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 4, 2018 04:00 | June 5, 2018 02:15 | 22h 15m | 6,405 | 9,573 |
| 2 | April 16, 2018 02:00 | April 16, 2018 08:45 | 6h 45m | 4,975 | 4,859 |
| 3 | July 12, 2018 21:15 | July 13, 2018 10:30 | 13h 15m | 3,034 | 2,663 |
| 4 | May 25, 2018 17:15 | May 26, 2018 21:00 | 1d 3h | 2,451 | 12K |
| 5 | March 19, 2018 14:45 | March 20, 2018 05:15 | 14h 30m | 2,315 | 7,007 |
| 6 | May 4, 2018 13:30 | May 5, 2018 00:45 | 11h 15m | 2,244 | 759 |
| 7 | May 28, 2018 22:30 | May 29, 2018 08:15 | 9h 45m | 2,145 | 12K |
| 8 | April 13, 2018 23:45 | April 14, 2018 01:45 | 2h | 1,982 | 996 |
| 9 | April 25, 2018 16:30 | April 26, 2018 01:45 | 9h 15m | 1,826 | 1,944 |
| 10 | October 29, 2018 15:30 | October 29, 2018 18:30 | 3h | 1,430 | 1,306 |
Outage episodes by size in 2018: 71 reached 100+ customers, 13 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 2018, 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 90% of Texas's customers in 2018; 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, 2018, 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/2018/texas/rockwall-county