Assumption ParishPower Outage History
What this grade means
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 |
|---|---|---|---|
| Jul 12, 2019 | 111 hrs | 12,744 (89%) | Hurricane Barry |
| Aug 29, 2021 | 18 hrs | 10,044 (70%) | Tropical Storm Ida |
| Aug 30, 2021 | <1 hr | 10,017 (70%) | Tropical Storm Ida |
| Aug 30, 2021 | 195 hrs | 10,017 (70%) | Tropical Storm Ida |
| Sep 11, 2024 | 84 hrs | 9,981 (70%) | Hurricane Francine |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Assumption Parish, Louisiana that day.
Over the 12 years from 2014 to 2025, Assumption Parish recorded 835 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in Assumption Parish started July 12, 2019 (Hurricane Barry), lasting 111 hours and leaving up to 12,744 customers without power (89% of the county) at its peak.
May has historically been the worst month for outages in Assumption Parish, with 97 events recorded during that month across the dataset.
Based on this history, Assumption Parish earns a Reliability Grade of F, placing it in the 3rd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Louisiana
Counties with the closest reliability grade and national percentile to Assumption Parish.
| County | Grade | National percentile |
|---|---|---|
| Union Parish | F | 3rd |
| St. Bernard Parish | F | 3rd |
| Orleans Parish | F | 3rd |
| Vernon Parish | F | 2nd |
| Ascension Parish | F | 2nd |
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 Assumption Parish?
Between 2014 and 2025, Assumption Parish recorded 835 outage events, averaging 3.5 hours each.
What is Assumption Parish's reliability grade?
Assumption Parish has a Reliability Grade of F, in the 3rd national percentile.
What was the worst power outage in Assumption Parish?
The worst outage on record started July 12, 2019 (Hurricane Barry), lasting 111 hours and affecting up to 12,744 customers.