Federal reliability data · 2026 research edition

U.S. Power Outage Reliability Index

We converted the latest full-year EIA state reliability table into a searchable backup-power dataset. It shows how many minutes of non-momentary interruptions the average customer experienced, how often interruptions occurred, and how much major events changed the result.

Download state CSV →Open state explorer

Source: U.S. Energy Information Administration, Electric Power Annual Table 11.3, Form EIA-861. The latest full-year table available as of September 2026 contains 2024 data.

Highest 2024 SAIDI

South Carolina

3,136.5 minutes (52.3 hours) of average annual interruption duration including major events.

Lowest 2024 SAIDI

District of Columbia

32.6 minutes (0.5 hours) in the same EIA any-method table.

U.S. total

10.2 hours

611.3 minutes including major events versus 126 minutes without major events—a difference of 8.1 hours.

Reusable research graphic

States with the most outage minutes

The chart uses 2024 all-event SAIDI from the same EIA table and includes attribution for editorial reuse.

Chart showing U.S. states with the highest annual power interruption minutes in EIA 2024 data

Download SVG graphic →

Duration ranking

States with the most outage minutes in 2024

SAIDI is the average annual minutes of non-momentary interruption experienced by a customer. Higher values mean more time without service on average.

Rank	State	SAIDI	Hours	Without major events	Derived major-event minutes	SAIFI
1	South Carolina	3,136.5 min	52.3 h	117.8 min	3018.7 min	2.365
2	Maine	1,748.6 min	29.1 h	274 min	1474.6 min	3.636
3	North Carolina	1,441 min	24.0 h	141.4 min	1299.6 min	1.812
4	Florida	1,321.5 min	22.0 h	66.4 min	1255.1 min	1.770
5	Texas	1,270.6 min	21.2 h	129.4 min	1141.2 min	2.114
6	Georgia	1,229.1 min	20.5 h	212.3 min	1016.8 min	2.122
7	West Virginia	1,165.5 min	19.4 h	486.1 min	679.4 min	2.832
8	New Hampshire	922.7 min	15.4 h	132.3 min	790.4 min	2.021
9	Louisiana	727.5 min	12.1 h	206 min	521.5 min	2.722
10	Vermont	696.7 min	11.6 h	275 min	421.7 min	2.516
11	Kentucky	648.3 min	10.8 h	153.3 min	495.0 min	1.955
12	Nebraska	641.7 min	10.7 h	73.6 min	568.1 min	1.232
13	Washington	623.5 min	10.4 h	158.6 min	464.9 min	1.752
14	Oregon	591 min	9.8 h	130.9 min	460.1 min	1.346
15	Mississippi	567.1 min	9.5 h	266.3 min	300.8 min	2.555
16	Ohio	510.5 min	8.5 h	133.2 min	377.3 min	1.298
17	Arkansas	509.1 min	8.5 h	194.6 min	314.5 min	2.128
18	Michigan	470.4 min	7.8 h	160.1 min	310.3 min	1.356
19	Virginia	418.3 min	7.0 h	166.4 min	251.9 min	1.627
20	Montana	351.5 min	5.9 h	156.6 min	194.9 min	1.621
21	Pennsylvania	336.1 min	5.6 h	131 min	205.1 min	1.353
22	Alaska	327.1 min	5.5 h	192.4 min	134.7 min	2.591
23	Hawaii	320.6 min	5.3 h	225.6 min	95.0 min	2.616
24	Indiana	312.4 min	5.2 h	121.4 min	191.0 min	1.283
25	Kansas	285.6 min	4.8 h	103.6 min	182.0 min	1.506
26	California	279.6 min	4.7 h	158.2 min	121.4 min	1.345
27	Alabama	279.4 min	4.7 h	117.8 min	161.6 min	1.870
28	New Mexico	278.8 min	4.6 h	156.5 min	122.3 min	1.321
29	Tennessee	278.6 min	4.6 h	159.5 min	119.1 min	2.000
30	Oklahoma	270.9 min	4.5 h	119.6 min	151.3 min	1.731
31	Wisconsin	266.1 min	4.4 h	91.3 min	174.8 min	1.020
32	Colorado	255.1 min	4.3 h	119 min	136.1 min	1.409
33	Idaho	232.8 min	3.9 h	174 min	58.8 min	1.314
34	Missouri	224.3 min	3.7 h	106 min	118.3 min	1.189
35	New York	219.9 min	3.7 h	72 min	147.9 min	0.910
36	Minnesota	219.6 min	3.7 h	92.2 min	127.4 min	1.250
37	New Jersey	174.2 min	2.9 h	99.7 min	74.5 min	1.119
38	Iowa	166.7 min	2.8 h	89.8 min	76.9 min	1.150
39	Nevada	158.9 min	2.6 h	63.8 min	95.1 min	1.108
40	Illinois	156.9 min	2.6 h	59.4 min	97.5 min	0.852
41	Connecticut	153.6 min	2.6 h	73.1 min	80.5 min	0.876
42	Wyoming	137.8 min	2.3 h	109.1 min	28.7 min	0.999
43	Utah	119.8 min	2.0 h	106.7 min	13.1 min	1.030
44	Maryland	118.1 min	2.0 h	75.1 min	43.0 min	0.817
45	Delaware	116.1 min	1.9 h	65.9 min	50.2 min	0.843
46	Rhode Island	104.3 min	1.7 h	60.8 min	43.5 min	0.896
47	Massachusetts	102 min	1.7 h	76.1 min	25.9 min	0.843
48	North Dakota	99.1 min	1.7 h	84.2 min	14.9 min	0.915
49	Arizona	87.5 min	1.5 h	72 min	15.5 min	0.988
50	South Dakota	84.7 min	1.4 h	62.1 min	22.6 min	0.815
51	District of Columbia	32.6 min	0.5 h	26.4 min	6.2 min	0.271

Frequency

Most interruption events

State	SAIFI	SAIDI
Maine	3.636	1748.6 min
West Virginia	2.832	1165.5 min
Louisiana	2.722	727.5 min
Hawaii	2.616	320.6 min
Alaska	2.591	327.1 min
Mississippi	2.555	567.1 min
Vermont	2.516	696.7 min
South Carolina	2.365	3136.5 min
Arkansas	2.128	509.1 min
Georgia	2.122	1229.1 min

Major-event exposure

Largest major-event duration gap

State	Derived gap	Share of all-event SAIDI
South Carolina	3018.7 min	96.2%
Maine	1474.6 min	84.3%
North Carolina	1299.6 min	90.2%
Florida	1255.1 min	95.0%
Texas	1141.2 min	89.8%
Georgia	1016.8 min	82.7%
New Hampshire	790.4 min	85.7%
West Virginia	679.4 min	58.3%
Nebraska	568.1 min	88.5%
Louisiana	521.5 min	71.7%

What the metrics mean

SAIDI, SAIFI and CAIDI

SAIDI is the total minutes of non-momentary interruption the average customer experienced during the year. SAIFI is the average number of non-momentary interruptions. CAIDI is the average restoration time per interruption.

This study uses EIA Table 11.3’s “Any Method” data, which combines utilities using IEEE reliability methods with utilities using other reporting methods. EIA separately publishes an IEEE-only table.

The “major-event minutes” column is our simple arithmetic difference between all-event SAIDI and SAIDI without major events. It is not an EIA-published metric by itself.

Do not read this as a personal outage forecast

State averages combine many utilities and customer territories. A household can experience very different reliability from the statewide average. Coverage also varies by state, and EIA notes that its reported-customer percentage can occasionally exceed 100% because the numerator and denominator come from different survey schedules.

Why this belongs on a backup-power site

Backup-system sizing should be driven by your actual critical loads and outage objective, but public reliability data helps show where major events dominate annual outage duration and why recharge redundancy matters.

Reproduce the analysis

Download the CSV, or use the interactive state explorer to sort by duration, frequency, restoration time and derived major-event impact.