County annual report · FIPS 08005
2023 Arapahoe County, CO Power Outage Report
In 2023, customers in Arapahoe County, CO went without power for an average of 2.1 hours, a total of 667K customer-hours (Colorado average 2.1 hours). That ranks 27th worst of 52 Colorado counties and 2264th 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 Arapahoe 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 2, 2023 08:15 | March 2, 2023 11:15 | 3h | 40,045 | 20K |
| 2 | June 16, 2023 05:00 | July 29, 2023 13:00 | 43d 8h | 27,946 | 110K |
| 3 | May 10, 2023 14:30 | May 14, 2023 22:15 | 4d 7h | 21,019 | 33K |
| 4 | June 11, 2023 21:15 | June 13, 2023 02:30 | 1d 5h | 10,978 | 23K |
| 5 | May 15, 2023 11:30 | May 18, 2023 01:45 | 2d 14h | 9,488 | 44K |
| 6 | May 27, 2023 11:45 | May 28, 2023 09:45 | 22h | 9,444 | 13K |
| 7 | October 24, 2023 11:30 | October 26, 2023 21:00 | 2d 9h | 6,324 | 13K |
| 8 | June 13, 2023 10:15 | June 14, 2023 11:45 | 1d 1h | 5,896 | 8,871 |
| 9 | August 10, 2023 13:15 | August 12, 2023 20:00 | 2d 6h | 5,868 | 9,817 |
| 10 | August 16, 2023 10:30 | August 18, 2023 08:45 | 1d 22h | 5,638 | 15K |
Outage episodes by size in 2023: 172 reached 100+ customers, 53 reached 1,000+ customers, 4 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 Arapahoe 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 |
| Mountain View Elec Assn, Inc | 2023 | 63 min | 0.52 | 45 min | 0.47 |
| Morgan County Rural Elec Assn | - | - | - | - | - |
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 ÷ 323,113 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. Arapahoe County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Arapahoe 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/arapahoe-county