Costilla CountyPower Outage History
2015–2025 · Colorado
Average — typical outage frequency and duration nationally.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 21, 2023 | 4 hrs | 3,824 (76%) | Unnamed event |
| May 10, 2024 | 10 hrs | 2,865 (57%) | Heavy Snow |
| Jul 21, 2023 | 1 hrs | 1,856 (37%) | Unnamed event |
| Oct 29, 2020 | 5 hrs | 1,676 (34%) | Winter Storm |
| Mar 17, 2019 | 3 hrs | 1,650 (33%) | Winter Storm |
Over the 11 years from 2015 to 2025, Costilla County recorded 257 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Costilla County started May 21, 2023, lasting 4 hours and leaving up to 3,824 customers without power (76% of the county) at its peak.
May has historically been the worst month for outages in Costilla County, with 39 events recorded during that month across the dataset.
Based on this history, Costilla County earns a Reliability Grade of C, placing it in the 50th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Colorado
Counties with the closest reliability grade and national percentile to Costilla County.
| County | Grade | National percentile |
|---|---|---|
| Boulder County | C | 48th |
| Teller County | C | 52nd |
| Crowley County | C | 52nd |
| Jefferson County | C | 45th |
| Gilpin County | C | 55th |
Most reliable counties in Colorado
The top 3 counties in Colorado by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Rio Blanco County | A | 99th |
| Baca County | A | 98th |
| Washington County | A | 98th |
Least reliable counties in Colorado
The bottom 3 counties in Colorado by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clear Creek County | F | 16th |
| Cheyenne County | D | 20th |
| Jackson County | D | 22nd |
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 Costilla County?
Between 2015 and 2025, Costilla County recorded 257 outage events, averaging 3.0 hours each.
What is Costilla County's reliability grade?
Costilla County has a Reliability Grade of C, in the 50th national percentile.
What was the worst power outage in Costilla County?
The worst outage on record started May 21, 2023, lasting 4 hours and affecting up to 3,824 customers.