County annual report · FIPS 08005
2025 Arapahoe County, CO Power Outage Report
In 2025, customers in Arapahoe County, CO went without power for an average of 1.5 hours, a total of 499K customer-hours (Colorado average 4.6 hours). That ranks 38th worst of 52 Colorado counties and 2597th 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 Arapahoe 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 | May 26, 2025 10:30 | May 26, 2025 20:15 | 9h 45m | 22,489 | 39K |
| 2 | June 14, 2025 14:45 | June 16, 2025 09:00 | 1d 18h | 7,406 | 9,167 |
| 3 | December 28, 2025 12:00 | December 28, 2025 14:30 | 2h 30m | 7,349 | 6,549 |
| 4 | January 21, 2025 15:30 | January 22, 2025 04:30 | 13h | 6,750 | 1,738 |
| 5 | June 2, 2025 10:45 | June 4, 2025 09:45 | 1d 23h | 5,220 | 12K |
| 6 | April 3, 2025 13:15 | April 4, 2025 02:15 | 13h | 4,935 | 1,767 |
| 7 | September 12, 2025 11:00 | September 16, 2025 07:45 | 3d 20h | 4,560 | 12K |
| 8 | July 29, 2025 14:30 | July 30, 2025 12:15 | 21h 45m | 4,431 | 19K |
| 9 | April 25, 2025 11:30 | April 28, 2025 09:30 | 2d 22h | 4,294 | 20K |
| 10 | July 1, 2025 12:45 | July 2, 2025 11:15 | 22h 30m | 4,285 | 8,138 |
Outage episodes by size in 2025: 204 reached 100+ customers, 70 reached 1,000+ customers, 1 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 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 |
| Mountain View Elec Assn, Inc | 2024 | 56 min | 0.49 | 42 min | 0.46 |
| 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 2025; 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, 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/arapahoe-county