County annual report · FIPS 08059
2025 Jefferson County, CO Power Outage Report
In 2025, customers in Jefferson County, CO went without power for an average of 13.6 hours, a total of 3.8M customer-hours (Colorado average 4.6 hours). That ranks 9th worst of 52 Colorado counties and 566th of 3,000 nationally.
Compared with CO, the US and 2024
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson 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 | December 17, 2025 13:30 | December 24, 2025 00:30 | 6d 11h | 51,319 | 2.9M |
| 2 | March 24, 2025 11:00 | March 25, 2025 02:15 | 15h 15m | 13,708 | 33K |
| 3 | June 6, 2025 09:15 | June 7, 2025 01:00 | 15h 45m | 9,344 | 9,944 |
| 4 | October 17, 2025 13:45 | October 19, 2025 02:15 | 1d 12h | 7,823 | 9,780 |
| 5 | January 8, 2025 15:45 | January 9, 2025 04:45 | 13h | 6,542 | 6,030 |
| 6 | June 21, 2025 02:15 | June 24, 2025 05:30 | 3d 3h | 6,536 | 20K |
| 7 | September 25, 2025 13:45 | September 26, 2025 08:30 | 18h 45m | 6,273 | 8,253 |
| 8 | June 10, 2025 12:15 | June 12, 2025 03:30 | 1d 15h | 6,064 | 24K |
| 9 | November 2, 2025 09:15 | November 2, 2025 22:30 | 13h 15m | 5,850 | 5,326 |
| 10 | September 29, 2025 14:30 | September 30, 2025 09:30 | 19h | 5,543 | 3,275 |
Outage episodes by size in 2025: 241 reached 100+ customers, 86 reached 1,000+ customers, 2 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 Jefferson 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 Colorado | 2024 | 5.9 hrs | 1.68 | 2.6 hrs | 1.36 |
| CORE Electric Cooperative | 2024 | 3.5 hrs | 0.93 | 74 min | 0.75 |
| United Power, Inc | 2024 | 77 min | 1.20 | 77 min | 1.20 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 Colorado's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 278,207 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, CO 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/colorado/jefferson-county