County annual report · FIPS 08005
2020 Arapahoe County, CO Power Outage Report
In 2020, customers in Arapahoe County, CO went without power for an average of 1.6 hours, a total of 508K customer-hours (Colorado average 2.2 hours). That ranks 36th worst of 57 Colorado counties and 2433rd of 3,019 nationally.
Compared with CO, the US and 2019
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Arapahoe County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 6, 2020 13:00 | June 10, 2020 10:45 | 3d 21h | 9,314 | 128K |
| 2 | June 26, 2020 23:30 | September 3, 2020 06:00 | 68d 6h | 5,274 | 147K |
| 3 | November 6, 2020 17:00 | November 8, 2020 23:45 | 2d 6h | 4,980 | 5,741 |
| 4 | September 7, 2020 13:30 | September 10, 2020 19:00 | 3d 5h | 4,679 | 9,460 |
| 5 | September 16, 2020 15:15 | September 17, 2020 06:15 | 15h | 4,321 | 6,512 |
| 6 | March 16, 2020 19:30 | March 17, 2020 03:30 | 8h | 4,124 | 2,332 |
| 7 | September 15, 2020 01:45 | September 15, 2020 23:00 | 21h 15m | 3,497 | 6,817 |
| 8 | June 4, 2020 00:30 | June 4, 2020 09:15 | 8h 45m | 3,334 | 5,818 |
| 9 | October 8, 2020 09:00 | October 9, 2020 01:30 | 16h 30m | 3,301 | 908 |
| 10 | April 22, 2020 14:45 | April 23, 2020 01:30 | 10h 45m | 3,255 | 5,276 |
Outage episodes by size in 2020: 137 reached 100+ customers, 34 reached 1,000+ customers, 0 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 2020, 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 | 2020 | 2.3 hrs | 1.03 | 83 min | 0.85 |
| CORE Electric Cooperative | 2020 | 2.0 hrs | 0.77 | 89 min | 0.68 |
| Mountain View Elec Assn, Inc | 2020 | 4.4 hrs | 0.76 | 3.9 hrs | 0.60 |
| 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 84% of Colorado's customers in 2020; 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, 2020, 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/2020/colorado/arapahoe-county