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Electric Power Annual

With Data for 2024 Release Date: October 16, 2025 Next Release: October 2026 full report PDF
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SAS Output
Table 11.2 Reliability Metrics Using IEEE of U.S. Distribution System by State, 2024 and 2023

  All Events (With Major Event Days) Without Major Event Days Loss of Supply Removed

Percent of Customers Reported SAIDI
(minutes per year)		 SAIFI
(times per year)		 CAIDI
(minutes per interruption)		 SAIDI
(minutes per year)		 SAIFI
(times per year)		 CAIDI
(minutes per interruption)		 SAIDI
(minutes per year)		 SAIFI
(times per year)		 CAIDI
(minutes per interruption)
Census Division
and State		 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023 Year 2024 Year 2023
New England 89.7% 83.3% 389.8 489.3 1.301 1.368 299.6 357.7 101.4 103.4 0.906 0.919 111.9 112.5 387.1 481.2 1.242 1.298 311.8 370.7
Connecticut 99.8% 79.0% 152.8 193.4 0.877 0.911 174.3 212.4 73.6 77.7 0.649 0.681 113.3 114 152.3 188.2 0.858 0.876 177.4 214.9
Maine 100.3% 100.8% 1748.6 1863 3.636 3.314 480.9 562.2 274 247.4 2.139 1.979 128.1 125 1701 1781.4 3.326 3.015 511.5 590.9
Massachusetts 90.2% 86.0% 103.7 265.3 0.852 1.069 121.8 248.2 77 83.5 0.748 0.79 102.9 105.7 103.9 268.5 0.829 1.025 125.3 262
New Hampshire 88.1% 88.2% 735.5 590.6 1.616 1.485 455.2 397.7 84.2 89.3 0.775 0.766 108.5 116.6 733 587.7 1.597 1.48 459 397.2
Rhode Island 97.6% 98.3% 104.3 104.6 0.896 0.782 116.4 133.7 60.8 52.2 0.761 0.667 79.9 78.3 99 100.8 0.862 0.736 114.9 136.9
Vermont 10.5% 10.4% 895.8 486.3 3.34 2.25 268.2 216.1 231.8 204.3 1.4 1.38 165.6 148.1 884.6 480.1 2.06 2.04 429.4 235.3
Middle Atlantic 60.5% 58.8% 309.1 196.8 1.34 1.041 230.7 189 121.5 112.2 0.986 0.89 123.3 126.1 299.7 185.9 1.232 0.951 243.2 195.5
New Jersey 99.2% 99.3% 173.3 108.2 1.116 0.88 155.3 122.9 98.8 88 0.944 0.83 104.7 106 161.2 99.2 0.971 0.783 166 126.8
New York 23.8% 20.0% 477.3 204.8 1.668 1.127 286.1 181.7 142.8 130.1 1.063 0.963 134.4 135.1 483.6 207.5 1.661 1.14 291.1 182
Pennsylvania 84.4% 84.3% 353.1 265.1 1.393 1.143 253.5 232 131.5 125.9 0.989 0.914 133 137.7 340.9 248.3 1.278 1.025 266.7 242.3
East North Central 91.2% 91.0% 357.8 489.5 1.159 1.187 308.6 412.3 114.3 108.8 0.869 0.808 131.5 134.6 342.5 483.4 1.058 1.113 323.7 434.5
Illinois 96.6% 96.3% 158 210.4 0.848 0.833 186.3 252.4 59.1 56.2 0.637 0.604 92.7 93 154.7 209.9 0.815 0.819 189.9 256.4
Indiana 84.3% 83.4% 310 467.4 1.276 1.414 242.9 330.6 123.3 111.3 1.008 0.944 122.4 118 252.3 462.1 1.14 1.292 221.4 357.6
Michigan 94.3% 94.2% 481.7 1127.7 1.365 1.543 353 730.9 161.3 164.8 0.983 0.931 164 177.1 456.2 1131.2 1.252 1.533 364.5 738
Ohio 96.5% 96.4% 511 366.6 1.298 1.252 393.7 292.7 133.3 127.1 0.999 0.918 133.4 138.4 500.3 336 1.124 1.075 445.1 312.6
Wisconsin 74.2% 74.5% 296.8 203.8 1.041 0.913 285.2 223.3 97.5 76.8 0.726 0.633 134.3 121.4 294.8 200.9 1.021 0.881 288.8 228
West North Central 76.9% 76.2% 255.3 222.7 1.229 1.093 207.8 203.8 93.9 84.6 0.879 0.811 106.8 104.3 254.7 215.6 1.113 0.973 228.9 221.5
Iowa 52.9% 52.8% 200.3 83.9 1.213 0.859 165.1 97.7 84.1 60.7 0.811 0.645 103.6 94.1 187 75.5 1.043 0.741 179.3 101.9
Kansas 80.0% 80.1% 289.8 287.1 1.503 1.327 192.8 216.3 104 101.8 1.005 1.004 103.5 101.4 277.9 274.4 1.35 1.171 205.9 234.3
Minnesota 86.9% 86.7% 222.4 127.1 1.262 0.973 176.3 130.6 91.5 72.8 0.902 0.778 101.5 93.6 222.3 123.6 1.144 0.859 194.3 143.9
Missouri 82.7% 83.6% 212.6 379 1.176 1.324 180.8 286.1 106.6 104.4 0.924 0.878 115.4 118.9 206 391.2 1.07 1.263 192.5 309.8
Nebraska 66.2% 67.0% 697.8 69.4 1.244 0.555 560.8 125.2 69.8 55.6 0.6 0.478 116.3 116.2 696.7 66.4 1.235 0.545 564 121.8
North Dakota 83.6% 63.2% 102.7 262.3 0.942 1.151 109 227.9 87 93.9 0.881 0.942 98.7 99.7 82.2 259 0.681 0.843 120.7 307.2
South Dakota 70.8% 67.9% 85.6 78.1 0.815 1.017 105 76.8 61.5 63.9 0.72 0.894 85.4 71.4 67.5 62.2 0.582 0.691 116 90.1
South Atlantic 81.8% 81.7% 1405.8 240.4 1.83 1.341 768.3 179.4 133.1 119.7 1.032 1.071 129 111.9 1352.3 211.7 1.671 1.176 809.3 180
Delaware 87.5% 87.4% 117.9 109.7 0.855 0.842 138 130.4 66.8 61.2 0.727 0.701 91.9 87.2 118.9 112.1 0.857 0.858 138.7 130.6
District of Columbia 98.9% 98.9% 32.6 71.9 0.271 0.37 120.2 194.2 26.4 33.3 0.246 0.318 107.2 104.6 32.6 71.9 0.271 0.37 120.2 194.2
Florida 84.1% 84.4% 1487.6 172.3 1.784 0.982 833.9 175.5 66.7 69.4 0.741 0.78 90 89 1485.6 160 1.716 0.929 865.9 172.3
Georgia 87.0% 87.8% 1208.1 342.7 2.104 1.858 574.3 184.5 211.4 133.4 1.244 1.336 170 99.9 768 300.3 1.905 1.765 403.2 170.1
Maryland 98.6% 98.7% 118.1 166.2 0.817 0.92 144.5 180.7 75.1 66.9 0.686 0.704 109.6 95.1 116.7 156.1 0.802 0.882 145.6 176.9
North Carolina 90.6% 88.5% 1518.1 262.5 1.826 1.526 831.3 172.1 143.9 156.4 1.176 1.282 122.4 121.9 1475 249.9 1.678 1.399 879.2 178.6
South Carolina 92.6% 92.2% 3155 169.8 2.368 1.512 1332.3 112.3 115.9 126.5 1.198 1.289 96.7 98.1 2972.9 140.4 2.054 1.197 1447.2 117.3
Virginia 30.6% 30.8% 962.1 292.8 2.238 1.655 429.9 176.9 245.1 239.9 1.641 1.522 149.4 157.6 911.2 280.6 2.038 1.561 447 179.8
West Virginia 97.3% 97.8% 1165.5 751.5 2.832 2.353 411.5 319.4 486.1 385.7 2.287 1.871 212.6 206.2 1067.4 700.4 2.5 2.1 427 333.5
East South Central 62.1% 61.5% 423.7 864.3 1.955 2.408 216.7 359 176.3 186.5 1.553 1.626 113.6 114.7 423 876.2 1.872 2.332 226 375.6
Alabama 15.5% 14.3% 197.7 400.2 1.749 2.281 113 175.4 120.8 189.5 1.29 1.481 93.6 128 189.6 380.2 1.654 1.972 114.6 192.8
Kentucky 93.8% 93.2% 537.7 861.5 1.783 1.859 301.6 463.4 145.7 140.6 1.216 1.129 119.8 124.5 520.1 841.1 1.58 1.657 329.2 507.5
Mississippi 69.3% 68.8% 607.3 877.8 2.482 2.627 244.7 334.1 279 266.6 1.882 2.113 148.3 126.2 693.8 991.9 2.714 2.932 255.7 338.3
Tennessee 73.5% 73.2% 289.3 926.9 1.939 2.803 149.2 330.7 169.9 192.7 1.752 1.891 97 101.9 283.3 933.4 1.896 2.773 149.4 336.5
West South Central 65.2% 64.8% 1268.9 685.6 2.23 1.928 568.9 355.7 164.2 163.3 1.446 1.405 113.5 116.2 1295.8 671.2 2.129 1.784 608.6 376.3
Arkansas 82.0% 82.0% 527.8 915.3 2.137 2.123 247 431.2 201.9 230.7 1.617 1.578 124.8 146.2 377.8 879 1.807 1.909 209.2 460.4
Louisiana 72.3% 72.3% 630.6 663.2 2.356 1.881 267.7 352.5 215.9 199.3 1.661 1.501 130 132.8 603 633.7 2.21 1.759 272.8 360.3
Oklahoma 46.2% 45.9% 220.7 1339.4 1.584 2.079 139.3 644.3 121.3 123.8 1.265 1.134 95.9 109.2 188.1 1012.7 1.251 1.713 150.4 591.2
Texas 64.9% 64.3% 1614.3 583.1 2.293 1.889 704.2 308.7 153.4 150.3 1.398 1.39 109.7 108.1 1724.6 604.3 2.27 1.777 759.9 340
Mountain 91.5% 90.2% 176.3 117.9 1.185 0.966 148.8 122 102.4 90.4 0.973 0.848 105.2 106.5 169.5 101.2 1.109 0.884 152.9 114.5
Arizona 95.7% 95.8% 83.6 103.8 0.963 0.951 86.8 109.2 69.8 66.9 0.88 0.788 79.4 84.9 75.8 88.7 0.935 0.916 81.1 96.8
Colorado 92.3% 88.8% 257 100.2 1.415 0.925 181.6 108.4 118.9 89.2 1.145 0.873 103.9 102.2 251.2 96.2 1.335 0.85 188.1 113.1
Idaho 93.2% 93.1% 204.4 134.4 1.314 1.071 155.5 125.5 152.5 121.8 1.136 0.985 134.2 123.6 150.5 95.9 0.959 0.757 157.1 126.7
Montana 72.3% 68.4% 341.7 113.9 1.628 1.052 209.8 108.3 152.3 113.9 1.163 1.052 130.9 108.3 298.1 93.9 1.36 0.852 219.2 110.2
Nevada 103.1% 102.7% 158.9 138.7 1.108 0.942 143.4 147.2 63.8 81.2 0.658 0.745 97 108.9 116.7 96.9 1.313 1.131 88.9 85.7
New Mexico 85.2% 85.1% 272.6 156 1.325 1.102 205.7 141.6 152 123.7 1.106 0.908 137.4 136.3 255.4 139 1.128 0.966 226.5 143.9
Utah 85.4% 85.5% 115.4 127.7 1.008 0.912 114.5 140 105 108.5 0.956 0.866 109.9 125.3 108.9 119.9 1.002 0.919 108.7 130.4
Wyoming 71.3% 65.9% 137.8 121.4 0.999 0.935 138 129.8 116 102.6 0.925 0.825 125.4 124.3 128.6 106.4 1.018 0.915 126.4 116.3
Pacific Contiguous 93.0% 92.8% 371.7 299.1 1.42 1.295 261.7 230.9 159.6 147.8 1.133 1.035 140.9 142.8 380 287.3 1.41 1.215 269.6 236.5
California 94.4% 94.6% 285 352.5 1.353 1.409 210.7 250.2 164.4 157.1 1.181 1.097 139.2 143.2 306.3 351.5 1.429 1.393 214.3 252.4
Oregon 87.5% 87.5% 579.3 122.9 1.324 0.808 437.6 152.1 124.1 103.5 0.824 0.738 150.6 140.4 547 115.9 1.197 0.753 457 153.9
Washington 90.0% 88.0% 643.5 153.8 1.774 1.05 362.8 146.5 157.3 129.8 1.085 0.915 144.9 141.9 587.2 113.4 1.445 0.725 406.3 156.4
Pacific Noncontiguous 36.9% 23.7% 329.8 456.2 2.55 3.374 129.3 135.2 195.4 325.7 1.92 2.366 101.7 137.6 307.3 472.5 1.524 2.503 201.7 188.8
Alaska 79.5% 47.7% 323.2 499.4 2.321 3.26 139.3 153.2 192.4 325.7 1.862 2.366 103.3 137.6 371 472.5 1.84 2.503 201.7 188.8
Hawaii 6.9% 6.9% 382.6 248.8 4.39 3.922 87.2 63.4 219.3   2.39   91.8   0   0      
U.S. Total 79.3% 78.4% 662.6 366.6 1.531 1.348 432.7 271.8 131.6 123.9 1.065 1.022 123.6 121.3 646.1 357.7 1.431 1.242 451.6 288

SAIDI = System Average Interruption Duration Index. It is the minutes of non-momentary electric interruptions, per year, the average customer experienced.
SAIFI = System Average Interruption Frequency Index. It is the number of non-momentary electric interruptions, per year, the average customer experienced.
CAIDI = Customer Average Interruption Duration Index. It is average number of minutes it takes to restore non-momentary electric interruptions.
IEEE refers to the IEEE 1366-2003 or the IEEE 1366-2012 standard.
A Major Event Day is any day that exceeds a daily SAIDI threshold called Tmed. Tmed is a duration statistic calculated from daily SAIDI values from the past five years.
Loss of Supply Removed excludes outages due to loss of supply from the high-voltage/bulk power system.
Percent of Customers Reported is an estimate of the percentage of total customers covered by these metrics. The numerator is reported number of meters used on the reliability schedule,
while the denominator is the number of customers reported on the sales to ultimate customers schedule. It is possible, in some instances, for this metric to exceed 100%.
For a five minute video explanation of these metrics, go to https://youtu.be/oVH9L0fCMTU.
Source: U.S. Energy Information Administration, Form EIA-861, Annual Electric Power Industry Report.