Rankings Infrastructure U.S. Energy Information Administration Table 11.3

Power Outages by State

South Carolina averaged 52.3 outage hours per customer in 2024, followed by Maine at 29.1 hours and North Carolina at 24.0 hours.

Entries ranked
50
States represented
50
Hours
52.3

Key takeaways

Power Outages by State

Power outages by state lasted longest in

3,136.5

South Carolina

Power outages by state lasted longest in South Carolina during 2024, where the average customer experienced 3,136.5 interruption minutes, or 52.3 hours. Maine ranked second at 29.1 hours.

Maine had the most frequent interruptions at

3.636

Maine

Maine had the most frequent interruptions at 3.636 per customer, followed by West Virginia at 2.832 and Louisiana at 2.722. Hawaii recorded 2.616 interruptions.

Major events produced

80%

South Carolina

Major events produced 80% of nationwide outage hours in 2024. South Carolina's major-event share reached about 96%, compared with 95% in Florida and 90% in North Carolina and Texas.

Map

Annual Power Outages by State Map

Hours
No data
South Carolina recorded 3,136.5 interruption minutes per customer in 2024, while South Dakota recorded 84.7. The national average was 611.3 minutes.
Annual Power Outages by State Map
Rank State Hours
1 South Carolina 52.3
2 Maine 29.1
3 North Carolina 24
4 Florida 22
5 Texas 21.2
6 Georgia 20.5
7 West Virginia 19.4
8 New Hampshire 15.4
9 Louisiana 12.1
10 Vermont 11.6
11 Kentucky 10.8
12 Nebraska 10.7
13 Washington 10.4
14 Oregon 9.9
15 Mississippi 9.5
16 Ohio 8.5
17 Arkansas 8.5
18 Michigan 7.8
19 Virginia 7
20 Montana 5.9
21 Pennsylvania 5.6
22 Alaska 5.5
23 Hawaii 5.3
24 Indiana 5.2
25 Kansas 4.8
26 California 4.7
27 Alabama 4.7
28 New Mexico 4.6
29 Tennessee 4.6
30 Oklahoma 4.5
31 Wisconsin 4.4
32 Colorado 4.3
33 Idaho 3.9
34 Missouri 3.7
35 New York 3.7
36 Minnesota 3.7
37 New Jersey 2.9
38 Iowa 2.8
39 Nevada 2.6
40 Illinois 2.6
41 Connecticut 2.6
42 Wyoming 2.3
43 Utah 2
44 Maryland 2
45 Delaware 1.9
46 Rhode Island 1.7
47 Massachusetts 1.7
48 North Dakota 1.7
49 Arizona 1.5
50 South Dakota 1.4

South Carolina recorded 3,136.5 interruption minutes per customer in 2024, while South Dakota recorded 84.7. The national average was 611.3 minutes.

Outage Hours/Year: highest, median, and lowest

Median

4.8

Across 50 ranked states

The highest value is 37× the lowest.

Power Outages by State Table

50 entries

Distribution

How outage hours/year varies across 50 states

50 states

The top three states account for 25.1% of the combined total.

States With the Longest Power Outages

Utility poles and power lines damaged after a severe storm
South Carolina, Maine, North Carolina, and Florida posted the longest average annual outage durations in 2024. South Carolina alone averaged 52.3 hours without power per customer.

South Carolina had the highest 2024 SAIDI at 3,136.5 minutes per customer, equal to 52.3 hours. Maine followed at 1,748.6 minutes, while North Carolina reached 1,441.0 and Florida reached 1,321.5.

South Dakota recorded the lowest annual duration at 84.7 minutes. Arizona followed at 87.5 minutes, while North Dakota had 99.1 and Massachusetts had 102.0.

Rank
1
State
South Carolina
Outage Hours/Year
52.3
Outages/Year
2.365
Rank
2
State
Maine
Outage Hours/Year
29.1
Outages/Year
3.636
Rank
3
State
North Carolina
Outage Hours/Year
24.0
Outages/Year
1.812
Rank
4
State
Florida
Outage Hours/Year
22.0
Outages/Year
1.77
Rank
5
State
Texas
Outage Hours/Year
21.2
Outages/Year
2.114
Rank
6
State
Georgia
Outage Hours/Year
20.5
Outages/Year
2.122
Rank
7
State
West Virginia
Outage Hours/Year
19.4
Outages/Year
2.832
Rank
8
State
New Hampshire
Outage Hours/Year
15.4
Outages/Year
2.021
Rank
9
State
Louisiana
Outage Hours/Year
12.1
Outages/Year
2.722
Rank
10
State
Vermont
Outage Hours/Year
11.6
Outages/Year
2.516

Power Outage Frequency by State

Utility control room with operators and large monitoring screens
Maine had the highest outage frequency in 2024 at 3.636 interruptions per customer, followed by West Virginia and Louisiana. South Dakota and Maryland were among the most stable on frequency.

Maine customers averaged 3.636 non-momentary interruptions in 2024, the highest SAIFI in the table. West Virginia followed at 2.832, Louisiana at 2.722, Hawaii at 2.616, and Alaska at 2.591.

South Dakota had the lowest frequency at 0.815 interruptions per customer. Maryland recorded 0.817, while Massachusetts and Delaware each reported 0.843.

Rank
1
State
Maine
Outages/Year
3.636
Avg. Outage (min)
480.9
Rank
2
State
West Virginia
Outages/Year
2.832
Avg. Outage (min)
411.5
Rank
3
State
Louisiana
Outages/Year
2.722
Avg. Outage (min)
267.2
Rank
4
State
Hawaii
Outages/Year
2.616
Avg. Outage (min)
122.6
Rank
5
State
Alaska
Outages/Year
2.591
Avg. Outage (min)
126.3
Rank
6
State
Mississippi
Outages/Year
2.555
Avg. Outage (min)
221.9
Rank
7
State
Vermont
Outages/Year
2.516
Avg. Outage (min)
276.9
Rank
8
State
South Carolina
Outages/Year
2.365
Avg. Outage (min)
1326.3
Rank
9
State
Arkansas
Outages/Year
2.128
Avg. Outage (min)
239.3
Rank
10
State
Georgia
Outages/Year
2.122
Avg. Outage (min)
579.2

Quick Answers

Which state had the most power outages in 2024?
South Carolina had the longest annual outage duration at 3,136.5 minutes, or 52.3 hours, per customer. Maine had the highest outage frequency at 3.636 interruptions per customer.
What is power outage duration by state?
State SAIDI ranged from 84.7 minutes in South Dakota to 3,136.5 minutes in South Carolina during 2024. The U.S. average was 611.3 minutes, or about 10.2 hours.
Which state has the most reliable power grid?
South Dakota had the lowest 2024 SAIDI at 84.7 minutes and the lowest SAIFI at 0.815 interruptions per customer. Arizona ranked second for annual duration at 87.5 minutes.
What do SAIDI and SAIFI mean?
South Carolina's SAIDI of 3,136.5 measures annual interruption minutes for the average customer. Its SAIFI of 2.365 measures interruption frequency, while its CAIDI of 1,326.3 minutes measures average restoration time.
How long is the average power outage?
National CAIDI was 401.9 minutes per interruption when major events were included in 2024. State averages ranged from Arizona's 88.6 minutes to South Carolina's 1,326.3 minutes.
Is this a live power outage map?
No, the 50-state ranking summarizes completed 2024 utility reliability reports and does not show customers currently without power. South Carolina's 3,136.5-minute SAIDI is an annual measure, not a current outage total.

Methodology

Figures come from 2024 Form EIA-861 utility reliability filings. Outage hours show the average total time a customer spent without power during the year, and outages per year count non-momentary interruptions per customer.

Sources

Information is cross-referenced with official state archives.
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