County annual report · FIPS 08069
2025 Larimer County, CO Power Outage Report
In 2025, customers in Larimer County, CO went without power for an average of 2.3 hours, a total of 355K customer-hours (Colorado average 4.6 hours). That ranks 30th worst of 52 Colorado counties and 2316th 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 Larimer 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 | December 17, 2025 14:45 | December 19, 2025 03:00 | 1d 12h | 8,624 | 74K |
| 2 | December 9, 2025 10:00 | December 10, 2025 06:30 | 20h 30m | 5,831 | 5,333 |
| 3 | July 9, 2025 14:30 | July 10, 2025 07:00 | 16h 30m | 5,533 | 7,571 |
| 4 | December 11, 2025 12:30 | December 12, 2025 01:00 | 12h 30m | 5,299 | 1,713 |
| 5 | December 19, 2025 08:45 | December 21, 2025 04:00 | 1d 19h | 5,025 | 128K |
| 6 | March 17, 2025 14:30 | March 18, 2025 05:45 | 15h 15m | 4,863 | 24K |
| 7 | August 23, 2025 06:45 | August 23, 2025 10:15 | 3h 30m | 3,036 | 9,486 |
| 8 | March 26, 2025 12:30 | March 27, 2025 21:30 | 1d 9h | 2,219 | 3,247 |
| 9 | August 9, 2025 13:45 | August 9, 2025 16:45 | 3h | 2,214 | 3,842 |
| 10 | February 25, 2025 16:00 | February 26, 2025 01:30 | 9h 30m | 2,035 | 2,009 |
Outage episodes by size in 2025: 83 reached 100+ customers, 21 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 Larimer 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 |
| Mountain Parks Electric, Inc | 2024 | 2.5 hrs | 1.76 | 85 min | 1.13 |
| Poudre Valley REA, Inc | 2024 | 5.4 hrs | 1.33 | 74 min | 0.72 |
| City of Fort Collins - (CO) | 2024 | 11 min | 0.24 | 11 min | 0.24 |
| City of Loveland - (CO) | 2024 | 81 min | 0.18 | 19 min | 0.18 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High West Energy, Inc | - | - | - | - | - |
| Town of Estes Park | - | - | - | - | - |
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 ÷ 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, 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/larimer-county