County annual report · FIPS 48251
2017 Johnson County, TX Power Outage Report
In 2017, customers in Johnson County, TX went without power for an average of 0.1 hours, a total of 8,049 customer-hours (Texas average 1.6 hours). That ranks 203rd worst of 249 Texas counties and 2563rd of 2,786 nationally.
Compared with TX, the US and 2015
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Johnson County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 12, 2017 15:30 | December 12, 2017 20:45 | 5h 15m | 1,542 | 465 |
| 2 | December 28, 2017 20:30 | December 29, 2017 05:30 | 9h | 337 | 365 |
| 3 | December 8, 2017 01:15 | December 8, 2017 07:30 | 6h 15m | 269 | 383 |
| 4 | December 19, 2017 11:15 | December 19, 2017 22:45 | 11h 30m | 268 | 1,599 |
| 5 | November 29, 2017 15:00 | November 30, 2017 00:00 | 9h | 210 | 125 |
| 6 | November 25, 2017 14:45 | November 25, 2017 20:15 | 5h 30m | 185 | 274 |
| 7 | December 16, 2017 14:45 | December 16, 2017 19:15 | 4h 30m | 174 | 203 |
| 8 | December 22, 2017 12:30 | December 22, 2017 16:30 | 4h | 167 | 668 |
| 9 | December 13, 2017 14:30 | December 13, 2017 21:45 | 7h 15m | 144 | 209 |
| 10 | December 24, 2017 15:00 | December 25, 2017 00:30 | 9h 30m | 133 | 472 |
Outage episodes by size in 2017: 13 reached 100+ customers, 1 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 Johnson County reported on EIA Form 861 for 2017, 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 |
| United Electric Coop Service Inc - (TX) | 2017 | 1.7 hrs | 0.96 | 59 min | 0.74 |
| HILCO Electric Cooperative, Inc. | 2017 | 3.1 hrs | 1.31 | 1.9 hrs | 1.20 |
| Texas-New Mexico Power Co | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Texas's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 76,674 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. Johnson County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, TX annual power outage report, 2017, 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/2017/texas/johnson-county