County annual report · FIPS 08031
2021 Denver County, CO Power Outage Report
In 2021, customers in Denver County, CO went without power for an average of 2.4 hours, a total of 974K customer-hours (Colorado average 2.8 hours). That ranks 26th worst of 52 Colorado counties and 2058th of 2,974 nationally.
Compared with CO, the US and 2020
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Denver County, 2021
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 18, 2021 10:30 | October 19, 2021 06:15 | 19h 45m | 23,477 | 64K |
| 2 | December 14, 2021 16:00 | December 19, 2021 23:30 | 5d 7h | 21,867 | 195K |
| 3 | August 11, 2021 15:30 | August 25, 2021 18:45 | 14d 3h | 10,471 | 60K |
| 4 | April 27, 2021 14:45 | April 29, 2021 02:30 | 1d 11h | 9,881 | 20K |
| 5 | December 11, 2021 09:30 | December 12, 2021 12:30 | 1d 3h | 9,398 | 25K |
| 6 | July 26, 2021 10:45 | August 6, 2021 05:00 | 10d 18h | 7,035 | 61K |
| 7 | December 29, 2021 14:15 | December 30, 2021 01:00 | 10h 45m | 6,625 | 1,683 |
| 8 | June 13, 2021 20:00 | June 19, 2021 02:45 | 5d 6h | 5,995 | 42K |
| 9 | September 16, 2021 13:45 | September 17, 2021 03:00 | 13h 15m | 5,834 | 5,086 |
| 10 | April 15, 2021 15:45 | April 19, 2021 04:15 | 3d 12h | 5,576 | 43K |
Outage episodes by size in 2021: 218 reached 100+ customers, 73 reached 1,000+ customers, 3 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 Denver County reported on EIA Form 861 for 2021, 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 | 2021 | 3.0 hrs | 1.20 | 2.2 hrs | 1.00 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 83% of Colorado's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 398,898 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. Denver County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Denver County, CO annual power outage report, 2021, 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/2021/colorado/denver-county