County annual report · FIPS 08059
2023 Jefferson County, CO Power Outage Report
In 2023, customers in Jefferson County, CO went without power for an average of 3.1 hours, a total of 854K customer-hours (Colorado average 2.1 hours). That ranks 18th worst of 52 Colorado counties and 1933rd of 2,977 nationally.
Compared with CO, the US and 2022
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 28, 2023 13:00 | April 3, 2023 06:15 | 5d 17h | 17,102 | 104K |
| 2 | August 15, 2023 12:15 | August 24, 2023 11:15 | 8d 23h | 13,916 | 54K |
| 3 | June 18, 2023 02:30 | July 1, 2023 05:00 | 13d 2h | 9,840 | 85K |
| 4 | September 21, 2023 17:00 | September 22, 2023 09:00 | 16h | 9,819 | 20K |
| 5 | August 12, 2023 21:30 | August 14, 2023 07:30 | 1d 10h | 9,390 | 12K |
| 6 | May 11, 2023 14:30 | May 14, 2023 01:45 | 2d 11h | 8,235 | 15K |
| 7 | November 4, 2023 06:30 | November 8, 2023 14:00 | 4d 7h | 7,986 | 19K |
| 8 | March 16, 2023 03:15 | March 17, 2023 07:00 | 1d 3h | 7,850 | 27K |
| 9 | July 4, 2023 20:30 | July 6, 2023 04:00 | 1d 7h | 5,627 | 12K |
| 10 | June 5, 2023 13:15 | June 6, 2023 11:30 | 22h 15m | 5,612 | 6,327 |
Outage episodes by size in 2023: 229 reached 100+ customers, 61 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 2023, 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 | 2023 | 1.9 hrs | 1.02 | 1.7 hrs | 0.98 |
| CORE Electric Cooperative | 2023 | 2.0 hrs | 0.90 | 64 min | 0.77 |
| United Power, Inc | 2023 | 65 min | 0.65 | 65 min | 0.65 |
| 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 2023; 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, 2023, 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/2023/colorado/jefferson-county