County annual report · FIPS 40141
2020 Tillman County, OK Power Outage Report
In 2020, customers in Tillman County, OK went without power for an average of 16.1 hours, a total of 53K customer-hours (Oklahoma average 27.7 hours). That ranks 20th worst of 77 Oklahoma counties and 518th of 3,019 nationally.
Compared with OK, the US and 2019
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Tillman County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 26, 2020 20:45 | November 6, 2020 23:00 | 11d 2h | 1,016 | 39K |
| 2 | November 24, 2020 14:30 | November 24, 2020 17:15 | 2h 45m | 862 | 460 |
| 3 | April 12, 2020 09:45 | April 12, 2020 23:00 | 13h 15m | 625 | 2,775 |
| 4 | June 22, 2020 05:30 | June 22, 2020 15:15 | 9h 45m | 604 | 1,539 |
| 5 | July 29, 2020 13:30 | July 29, 2020 17:30 | 4h | 589 | 2,212 |
| 6 | July 31, 2020 06:45 | July 31, 2020 09:30 | 2h 45m | 378 | 872 |
| 7 | May 16, 2020 00:00 | May 16, 2020 07:45 | 7h 45m | 244 | 568 |
| 8 | May 14, 2020 02:30 | May 14, 2020 11:00 | 8h 30m | 243 | 1,092 |
| 9 | March 15, 2020 00:15 | March 15, 2020 01:30 | 1h 15m | 238 | 298 |
| 10 | June 2, 2020 16:00 | June 2, 2020 17:15 | 1h 15m | 199 | 201 |
Outage episodes by size in 2020: 17 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 Tillman County reported on EIA Form 861 for 2020, 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 | 2020 | 4.4 hrs | 1.41 | 89 min | 1.03 |
| Cotton Electric Coop, Inc | 2020 | 10.1 hrs | 3.38 | 3.7 hrs | 2.04 |
| 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 93% of Oklahoma's customers in 2020; 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, 2020, 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/2020/oklahoma/tillman-county