massoutage

2021 Tennessee Power Outage Report

In 2021, the average Tennessee customer went without power for about 3.7 hours — the 29th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
3.7
Peak customers out
83,500
Rank (worst state)
29th
Counties affected
20

Tennessee outages over the decade

Average hours without power per customer, 2021 highlighted.

2.4h20152.5h20165.6h20172.1h20182.7h20196.5h20203.7h20219.2h202211.1h20234.8h20244.3h2025

Hardest-hit Tennessee counties in 2021

By peak customers out during the year's worst event.

1Davidson County83,5002Bedford County33,2773Shelby County30,2824Knox County28,1845Cocke County16,6686Madison County15,7637Lawrence County15,6488Rutherford County11,5899Macon County11,02710Marion County9,92211Sumner County9,78512Giles County9,15013Cumberland County8,57514Bradley County8,47515Blount County7,90716Henry County7,82517Robertson County7,65318Wilson County7,62819Montgomery County5,91420Maury County5,743

Biggest Tennessee outages of 2021

CountyBeganPeak customers out
Davidson CountyDecember 10, 202183,500
Bedford CountyFebruary 15, 202133,277
Shelby CountyDecember 10, 202130,282
Knox CountyNovember 11, 202128,184
Bedford CountyMarch 1, 202126,649
Bedford CountyMarch 5, 202126,559
Shelby CountyMarch 25, 202122,695
Shelby CountySeptember 30, 202119,658
Shelby CountyNovember 20, 202118,986
Cocke CountyApril 7, 202116,668
Tennessee by year:20252024202320222020201920182017
Other states in 2021:LAMIWVTXORMS

Part of the 2021 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.