County annual report · FIPS 56037
2025 Sweetwater County, WY Power Outage Report
In 2025, customers in Sweetwater County, WY went without power for an average of 1.4 hours, a total of 36K customer-hours (Wyoming average 3.8 hours). That ranks 17th worst of 20 Wyoming counties and 2650th of 3,000 nationally.
Compared with WY, the US and 2024
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Sweetwater 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 | November 10, 2025 20:30 | November 11, 2025 01:45 | 5h 15m | 6,041 | 4,061 |
| 2 | November 11, 2025 19:15 | November 11, 2025 20:15 | 1h | 5,737 | 1,463 |
| 3 | March 11, 2025 14:15 | March 11, 2025 20:15 | 6h | 1,003 | 952 |
| 4 | March 30, 2025 00:00 | March 30, 2025 13:00 | 13h | 397 | 1,628 |
| 5 | March 14, 2025 21:15 | March 15, 2025 01:15 | 4h | 340 | 257 |
| 6 | December 29, 2025 06:15 | December 29, 2025 12:30 | 6h 15m | 323 | 477 |
| 7 | May 5, 2025 16:30 | May 6, 2025 22:30 | 1d 6h | 259 | 2,699 |
| 8 | April 4, 2025 14:30 | April 4, 2025 20:00 | 5h 30m | 224 | 314 |
| 9 | October 8, 2025 04:00 | October 8, 2025 07:15 | 3h 15m | 184 | 598 |
| 10 | August 25, 2025 02:30 | August 25, 2025 17:45 | 15h 15m | 164 | 1,333 |
Outage episodes by size in 2025: 26 reached 100+ customers, 3 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 Sweetwater 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2024 | 4.6 hrs | 1.67 | 2.0 hrs | 1.11 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Bridger Valley Elec Assn, Inc | - | - | - | - | - |
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 Wyoming's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 25,475 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. Sweetwater County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sweetwater County, WY 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/wyoming/sweetwater-county