Denver CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 15, 2019 | <1 hr | 141,684 (36%) | Unnamed event |
| Mar 13, 2019 | 78 hrs | 61,512 (15%) | Blizzard |
| Jun 6, 2020 | 68 hrs | 40,714 (10%) | Thunderstorm Wind |
| May 21, 2022 | 62 hrs | 32,049 (8%) | Winter Storm |
| Nov 8, 2024 | 46 hrs | 28,569 (7%) | Winter Weather |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Denver County, Colorado that day.
Over the 12 years from 2014 to 2025, Denver County recorded 3,302 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Denver County started February 15, 2019, lasting less than 1 hour and leaving up to 141,684 customers without power (36% of the county) at its peak.
July has historically been the worst month for outages in Denver County, with 468 events recorded during that month across the dataset.
Based on this history, Denver County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Colorado
Counties with the closest reliability grade and national percentile to Denver County.
| County | Grade | National percentile |
|---|---|---|
| Pitkin County | B | 70th |
| Garfield County | B | 70th |
| Elbert County | B | 68th |
| Lincoln County | B | 66th |
| La Plata County | B | 66th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Denver County?
Between 2014 and 2025, Denver County recorded 3,302 outage events, averaging 2.0 hours each.
What is Denver County's reliability grade?
Denver County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Denver County?
The worst outage on record started February 15, 2019, lasting less than 1 hour and affecting up to 141,684 customers.