County annual report · FIPS 20191
2025 Sumner County, KS Power Outage Report
In 2025, customers in Sumner County, KS went without power for an average of 2.8 hours, a total of 25K customer-hours (Kansas average 2.9 hours). That ranks 49th worst of 99 Kansas counties and 2134th of 3,000 nationally.
Compared with KS, the US and 2024
Coverage line is EAGLE-I's share of Kansas customers tracked each year.
Biggest outages in Sumner 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 | June 21, 2025 18:45 | June 21, 2025 21:45 | 3h | 838 | 2,332 |
| 2 | May 2, 2025 12:15 | May 2, 2025 14:45 | 2h 30m | 806 | 2,015 |
| 3 | June 17, 2025 10:00 | June 20, 2025 04:30 | 2d 18h | 470 | 7,106 |
| 4 | June 7, 2025 07:30 | June 9, 2025 02:45 | 1d 19h | 415 | 5,665 |
| 5 | March 4, 2025 23:15 | March 5, 2025 01:00 | 1h 45m | 328 | 477 |
| 6 | May 29, 2025 03:30 | May 29, 2025 07:30 | 4h | 265 | 489 |
| 7 | January 5, 2025 13:15 | January 6, 2025 03:45 | 14h 30m | 241 | 859 |
| 8 | August 23, 2025 10:15 | August 23, 2025 13:00 | 2h 45m | 167 | 336 |
| 9 | September 25, 2025 05:00 | September 25, 2025 07:00 | 2h | 166 | 332 |
| 10 | July 12, 2025 20:00 | July 12, 2025 21:30 | 1h 30m | 125 | 188 |
Outage episodes by size in 2025: 10 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 Sumner 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 |
|---|---|---|---|---|---|
| Evergy Metro | 2024 | 6.0 hrs | 1.52 | 83 min | 0.93 |
| Evergy Kansas South, Inc | 2024 | 3.4 hrs | 1.40 | 87 min | 0.94 |
| Wheatland Electric Coop, Inc | 2024 | 3.7 hrs | 2.26 | 2.1 hrs | 1.77 |
| Sedgwick County El Coop Assn Inc | 2018 | 1.7 hrs | 1.00 | 1.7 hrs | 1.00 |
| Sumner-Cowley Elec Coop, Inc | - | - | - | - | - |
| City of Mulvane - (KS) | - | - | - | - | - |
| City of Oxford - (KS) | - | - | - | - | - |
| City of Wellington - (KS) | - | - | - | - | - |
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 Kansas's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,773 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. Sumner County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sumner County, KS 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/kansas/sumner-county