County annual report · FIPS 40045
2025 Ellis County, OK Power Outage Report
In 2025, customers in Ellis County, OK went without power for an average of 22.1 hours, a total of 55K customer-hours (Oklahoma average 4.9 hours). That ranks 3rd worst of 77 Oklahoma counties and 297th of 3,000 nationally.
Compared with OK, the US and 2024
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Ellis County, 2025
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 20, 2025 23:30 | September 21, 2025 16:30 | 17h | 3,060 | 24K |
| 2 | January 5, 2025 18:15 | January 6, 2025 07:00 | 12h 45m | 1,953 | 7,235 |
| 3 | January 6, 2025 13:00 | January 6, 2025 19:30 | 6h 30m | 1,953 | 1,060 |
| 4 | May 27, 2025 00:15 | May 27, 2025 06:15 | 6h | 1,929 | 621 |
| 5 | September 23, 2025 04:30 | September 23, 2025 05:45 | 1h 15m | 1,883 | 1,144 |
| 6 | July 7, 2025 05:15 | July 7, 2025 08:45 | 3h 30m | 1,360 | 3,071 |
| 7 | April 25, 2025 03:15 | April 25, 2025 06:00 | 2h 45m | 558 | 837 |
| 8 | March 19, 2025 07:45 | March 19, 2025 19:30 | 11h 45m | 482 | 2,616 |
| 9 | March 14, 2025 18:15 | March 15, 2025 06:00 | 11h 45m | 481 | 1,251 |
| 10 | September 1, 2025 22:45 | September 2, 2025 04:15 | 5h 30m | 420 | 572 |
Outage episodes by size in 2025: 21 reached 100+ customers, 6 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 Ellis County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| Northwestern Electric Coop Inc - (OK) | - | - | - | - | - |
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 Oklahoma's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,488 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. Ellis County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ellis County, OK annual power outage report, 2025, 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/). https://massoutage.com/reports/2025/oklahoma/ellis-county