County annual report · FIPS 48113
2018 Dallas County, TX Power Outage Report
In 2018, customers in Dallas County, TX went without power for an average of 2.6 hours, a total of 2.5M customer-hours (Texas average 2.4 hours). That ranks 168th worst of 253 Texas counties and 1625th 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 Dallas 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 | August 18, 2018 13:15 | September 2, 2018 06:45 | 14d 17h | 12,420 | 106K |
| 2 | October 12, 2018 10:45 | November 8, 2018 09:30 | 26d 22h | 12,131 | 230K |
| 3 | September 19, 2018 11:45 | October 2, 2018 11:45 | 13d | 10,854 | 199K |
| 4 | July 28, 2018 10:30 | August 4, 2018 07:00 | 6d 20h | 10,613 | 60K |
| 5 | May 21, 2018 08:30 | May 24, 2018 23:15 | 3d 14h | 10,469 | 33K |
| 6 | May 25, 2018 10:30 | May 26, 2018 10:30 | 1d | 8,513 | 14K |
| 7 | December 26, 2018 11:30 | December 30, 2018 10:45 | 3d 23h | 8,443 | 79K |
| 8 | May 1, 2018 12:00 | May 13, 2018 10:00 | 11d 22h | 7,874 | 81K |
| 9 | February 20, 2018 23:45 | March 6, 2018 01:00 | 13d 1h | 7,247 | 100K |
| 10 | December 17, 2018 10:15 | December 22, 2018 06:30 | 4d 20h | 6,484 | 26K |
Outage episodes by size in 2018: 86 reached 100+ customers, 59 reached 1,000+ customers, 5 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 Dallas 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 |
| Trinity Valley Elec Coop Inc | 2018 | 2.2 hrs | 1.77 | 2.2 hrs | 1.77 |
| HILCO Electric Cooperative, Inc. | 2018 | 1.7 hrs | 0.92 | 1.6 hrs | 0.92 |
| Texas-New Mexico Power Co | - | - | - | - | - |
| City of Garland - (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 90% of Texas's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 948,355 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. Dallas County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallas 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/dallas-county