County annual report · FIPS 08069
2021 Larimer County, CO Power Outage Report
In 2021, customers in Larimer County, CO went without power for an average of 2.9 hours, a total of 452K customer-hours (Colorado average 2.8 hours). That ranks 21st worst of 52 Colorado counties and 1867th 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 Larimer 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 | March 14, 2021 07:15 | March 17, 2021 15:30 | 3d 8h | 12,879 | 205K |
| 2 | June 17, 2021 19:00 | June 18, 2021 05:30 | 10h 30m | 6,299 | 15K |
| 3 | December 15, 2021 17:00 | December 17, 2021 04:45 | 1d 11h | 5,269 | 49K |
| 4 | September 30, 2021 14:45 | September 30, 2021 22:30 | 7h 45m | 5,141 | 5,688 |
| 5 | October 20, 2021 14:15 | October 20, 2021 22:00 | 7h 45m | 4,231 | 32K |
| 6 | June 16, 2021 14:15 | June 17, 2021 18:15 | 1d 4h | 3,021 | 42K |
| 7 | August 6, 2021 23:30 | August 7, 2021 07:30 | 8h | 1,896 | 3,043 |
| 8 | April 28, 2021 01:45 | April 29, 2021 04:30 | 1d 2h | 1,859 | 12K |
| 9 | March 29, 2021 15:00 | March 30, 2021 13:15 | 22h 15m | 1,856 | 11K |
| 10 | March 13, 2021 15:15 | March 13, 2021 18:45 | 3h 30m | 1,742 | 1,858 |
Outage episodes by size in 2021: 92 reached 100+ customers, 21 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 Larimer 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 |
| Mountain Parks Electric, Inc | 2021 | 2.2 hrs | 1.47 | 1.9 hrs | 1.21 |
| Poudre Valley REA, Inc | 2021 | 5.5 hrs | 1.57 | 77 min | 0.84 |
| City of Loveland - (CO) | 2021 | 53 min | 0.46 | 53 min | 0.46 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High West Energy, Inc | - | - | - | - | - |
| Town of Estes Park | - | - | - | - | - |
| City of Fort Collins - (CO) | - | - | - | - | - |
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 ÷ 154,680 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. Larimer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Larimer 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/larimer-county