County annual report · FIPS 48269
2021 King County, TX Power Outage Report
In 2021, customers in King County, TX went without power for an average of 1.3 hours, a total of 155 customer-hours (Texas average 21.0 hours). That ranks 249th worst of 252 Texas counties and 2548th of 2,974 nationally.
Compared with TX, the US and 2020
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in King County, 2021
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 11, 2021 09:30 | July 11, 2021 11:15 | 1h 45m | 33 | 35 |
| 2 | February 14, 2021 04:15 | February 14, 2021 10:15 | 6h | 17 | 78 |
| 3 | October 26, 2021 20:15 | October 26, 2021 20:45 | 30m | 13 | 7 |
| 4 | July 16, 2021 07:30 | July 16, 2021 08:15 | 45m | 12 | 9 |
| 5 | January 15, 2021 19:15 | January 15, 2021 19:30 | 15m | 2 | 1 |
| 6 | February 15, 2021 10:30 | February 15, 2021 18:45 | 8h 15m | 1 | 8 |
| 7 | February 16, 2021 22:00 | February 16, 2021 23:15 | 1h 15m | 1 | 1 |
| 8 | May 11, 2021 16:15 | May 11, 2021 18:00 | 1h 45m | 1 | 2 |
| 9 | May 15, 2021 18:00 | May 15, 2021 19:15 | 1h 15m | 1 | 1 |
| 10 | May 16, 2021 21:00 | May 16, 2021 22:15 | 1h 15m | 1 | 1 |
Outage episodes by size in 2021: 0 reached 100+ customers, 0 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 King County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| AEP Texas North Company | 2021 | 18.9 hrs | 2.72 | 1.9 hrs | 1.24 |
| Tri-County Electric Coop, Inc (TX) | 2021 | 31.8 hrs | 3.38 | 5.5 hrs | 2.89 |
| South Plains Electric Coop Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Texas's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 119 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. King County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), King County, TX annual power outage report, 2021, 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/2021/texas/king-county