Mason CountyPower Outage History
2018–2025 · Texas
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 15, 2021 | 31 hrs | 3,022 (97%) | Winter Storm Uri |
| Feb 16, 2021 | 40 hrs | 3,018 (97%) | Winter Storm Uri |
| Feb 18, 2021 | 27 hrs | 3,014 (97%) | Winter Storm Uri |
| Dec 18, 2025 | <1 hr | 2,798 (90%) | Unnamed event |
| Apr 29, 2020 | 2 hrs | 1,462 (47%) | Unnamed event |
Over the 8 years from 2018 to 2025, Mason County recorded 348 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Mason County started February 15, 2021 (Winter Storm Uri), lasting 31 hours and leaving up to 3,022 customers without power (97% of the county) at its peak.
May has historically been the worst month for outages in Mason County, with 67 events recorded during that month across the dataset.
Based on this history, Mason County earns a Reliability Grade of F, placing it in the 18th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Mason County's outage profile
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Read our mission →Similar counties in Texas
Counties with the closest reliability grade and national percentile to Mason County.
| County | Grade | National percentile |
|---|---|---|
| Medina County | F | 18th |
| Roberts County | F | 18th |
| Duval County | F | 17th |
| Zapata County | F | 18th |
| Reagan County | F | 18th |
Most reliable counties in Texas
The top 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Zavala County | A | 95th |
| Jasper County | A | 94th |
| Fayette County | A | 91st |
Least reliable counties in Texas
The bottom 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Trinity County | F | 2nd |
| Orange County | F | 2nd |
| Marion County | F | 4th |
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 Mason County?
Between 2018 and 2025, Mason County recorded 348 outage events, averaging 2.2 hours each.
What is Mason County's reliability grade?
Mason County has a Reliability Grade of F, in the 18th national percentile.
What was the worst power outage in Mason County?
The worst outage on record started February 15, 2021 (Winter Storm Uri), lasting 31 hours and affecting up to 3,022 customers.