County annual report · FIPS 40141
2025 Tillman County, OK Power Outage Report
In 2025, customers in Tillman County, OK went without power for an average of 11.0 hours, a total of 36K customer-hours (Oklahoma average 4.9 hours). That ranks 16th worst of 77 Oklahoma counties and 724th 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 Tillman 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 | April 29, 2025 22:45 | May 5, 2025 19:45 | 5d 21h | 818 | 14K |
| 2 | October 23, 2025 23:00 | October 24, 2025 03:15 | 4h 15m | 602 | 768 |
| 3 | August 3, 2025 12:45 | August 3, 2025 15:30 | 2h 45m | 598 | 1,051 |
| 4 | November 12, 2025 23:00 | November 13, 2025 00:30 | 1h 30m | 598 | 897 |
| 5 | June 25, 2025 18:15 | June 25, 2025 21:45 | 3h 30m | 597 | 2,089 |
| 6 | July 25, 2025 09:00 | July 25, 2025 16:15 | 7h 15m | 596 | 2,681 |
| 7 | May 29, 2025 19:30 | May 29, 2025 19:45 | 15m | 463 | 116 |
| 8 | April 26, 2025 09:15 | April 26, 2025 20:30 | 11h 15m | 420 | 766 |
| 9 | April 2, 2025 11:45 | April 2, 2025 16:00 | 4h 15m | 241 | 610 |
| 10 | May 7, 2025 21:45 | May 8, 2025 04:30 | 6h 45m | 217 | 630 |
Outage episodes by size in 2025: 21 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 Tillman 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 |
|---|---|---|---|---|---|
| Public Service Co of Oklahoma | 2024 | 3.1 hrs | 1.55 | 1.9 hrs | 1.30 |
| Cotton Electric Coop, Inc | 2024 | 5.9 hrs | 3.13 | 3.7 hrs | 2.27 |
| Southwest Rural Elec Assn Inc | - | - | - | - | - |
| City of Frederick - (OK) | - | - | - | - | - |
| City of Manitou - (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 ÷ 3,295 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. Tillman County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tillman 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/oklahoma/tillman-county