Most Reliable US Electric Utilities
East Mississippi Elec Pwr Assn is the most reliable large US electric utility on record, with customers averaging just 6 min without power per year (SAIDI, from official EIA Form 861 data). The full ranking of the most reliable utilities that serve three or more counties is below, lower SAIDI is better.
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| # | Utility | State | Live feed | SAIDI (hrs/yr) | SAIFI (/yr) | Counties |
|---|---|---|---|---|---|---|
| 1 | East Mississippi Elec Pwr Assn | MS | No live feed | 6 min | 2.6 | 10 |
| 2 | Fall River Rural Elec Coop Inc | ID | Live · total only | 8 min | 0.1 | 7 |
| 3 | City of Marshfield - (WI) | WI | No live feed | 13 min | 0.1 | 3 |
| 4 | City of Elk River | MN | No live feed | 19 min | 0.3 | 3 |
| 5 | West River Electric Assn Inc | SD | Live · total only | 24 min | 0.3 | 6 |
| 6 | Bristol Virginia Utilities | VA | No live feed | 25 min | 0.2 | 3 |
| 7 | Dakota Electric Association | MN | Outages only | 29 min | 0.3 | 4 |
| 8 | Rock Energy Cooperative | IL | Live · total only | 33 min | 0.5 | 8 |
| 9 | Brunswick Electric Member Corp | NC | Live · total only | 41 min | 0.6 | 4 |
| 10 | Verendrye Electric Coop Inc | ND | Live · total only | 42 min | 0.7 | 10 |
| 11 | South Carolina Public Service Authority | SC | Live · total only | 43 min | 0.7 | 3 |
| 12 | Woodruff Electric Coop Corp | AR | Live · total only | 45 min | 0.4 | 7 |
| 13 | Wright-Hennepin Coop Elec Assn | MN | Live · total only | 45 min | 0.6 | 7 |
| 14 | Florida Power & Light Co | FL | Live · total only | 47 min | 0.5 | 43 |
| 15 | Cobb Electric Membership Corp | GA | Live · total only | 48 min | 0.9 | 5 |
| 16 | Dixie Escalante R E A, Inc | UT | Live · total only | 49 min | 0.3 | 4 |
| 17 | Denton County Elec Coop, Inc | TX | Live · total only | 49 min | 0.4 | 6 |
| 18 | Middle Tennessee E M C | TN | Live · total only | 50 min | 0.9 | 12 |
| 19 | Palmetto Electric Coop Inc | SC | Live · total only | 51 min | 0.8 | 4 |
| 20 | Union Electric Membership Corp - (NC) | NC | Live · total only | 52 min | 0.7 | 5 |
| 21 | Connexus Energy | MN | No live feed | 54 min | 0.6 | 8 |
| 22 | Iowa Lakes Electric Coop | IA | Live · total only | 55 min | 0.4 | 13 |
| 23 | Northeastern Rural E M C | IN | Live · total only | 57 min | 0.9 | 6 |
| 24 | Jones-Onslow Elec Member Corp | NC | Live · total only | 57 min | 0.7 | 6 |
| 25 | Turlock Irrigation District | CA | Live · total only | 62 min | 0.7 | 3 |
| 26 | Hancock-Wood Electric Coop Inc | OH | No live feed | 62 min | 1.3 | 11 |
| 27 | Sioux Valley SW Elec Coop | SD | Live · total only | 63 min | 1.7 | 15 |
| 28 | Dakota Valley Elec Coop Inc | ND | Live · total only | 64 min | 0.3 | 8 |
| 29 | Midwest Electric Member Corp - (NE) | NE | No live feed | 65 min | 0.4 | 5 |
| 30 | Sawnee Electric Membership Corporation | GA | Live · total only | 66 min | 1.1 | 7 |
| 31 | Salt River Project | AZ | Live · total only | 66 min | 1.0 | 3 |
| 32 | City of Wilson - (NC) | NC | Live · total only | 66 min | 0.5 | 7 |
| 33 | York Electric Coop Inc | SC | No live feed | 66 min | 0.5 | 6 |
| 34 | Public Service Elec & Gas Co | NJ | Live · total only | 66 min | 0.7 | 15 |
| 35 | East-Central Iowa Rural Elec Coop | IA | Live · total only | 67 min | 0.9 | 11 |
| 36 | Boone Electric Coop | MO | Live · total only | 67 min | 0.7 | 6 |
| 37 | El Paso Electric Co | NM | No live feed | 69 min | 0.9 | 7 |
| 38 | Cimarron Electric Coop | OK | Live · total only | 70 min | 0.8 | 9 |
| 39 | Oklahoma Electric Coop Inc | OK | Live · total only | 70 min | 1.3 | 7 |
| 40 | Holy Cross Electric Assn, Inc | CO | Live · total only | 71 min | 1.1 | 5 |
| 41 | Northern Electric Coop, Inc | SD | Live · total only | 72 min | 0.7 | 12 |
| 42 | Arizona Public Service Co | AZ | Live · total only | 73 min | 0.8 | 17 |
| 43 | Tullahoma Board-Public Utils | TN | Live · total only | 74 min | 3.0 | 4 |
| 44 | Commonwealth Edison Co | IL | Live · total only | 77 min | 0.7 | 25 |
| 45 | Platte-Clay Electric Coop, Inc | MO | Live · total only | 79 min | 1.1 | 7 |
| 46 | Mountain Electric Coop, Inc | NC | No live feed | 79 min | 4.1 | 6 |
| 47 | Atlantic City Electric Co | NJ | Live · total only | 80 min | 0.7 | 8 |
| 48 | Southwest Public Power Dist | NE | No live feed | 80 min | 1.0 | 6 |
| 49 | Potomac Electric Power Co | MD | Live · total only | 84 min | 0.6 | 3 |
| 50 | City of Frankfort - (KY) | KY | No live feed | 85 min | 0.8 | 3 |
| 51 | Duke Energy Florida, LLC | FL | Live · total only | 87 min | 1.0 | 32 |
| 52 | Minnesota Valley Electric Coop | MN | Live · total only | 87 min | 0.7 | 9 |
| 53 | Choctawhatche Elec Coop, Inc | FL | Live · total only | 88 min | 0.9 | 4 |
| 54 | Tri-County Elec Member Corp (NC) | NC | Live · total only | 89 min | 0.7 | 7 |
| 55 | Pedernales Electric Coop, Inc | TX | Live · total only | 90 min | 1.2 | 24 |
| 56 | Trico Electric Cooperative Inc | AZ | Live · total only | 1.5 hrs | 0.7 | 4 |
| 57 | Steele-Waseca Cooperative Electric | MN | Outages only | 1.5 hrs | 0.7 | 9 |
| 58 | Farmers Electric Coop, Inc - (TX) | TX | Live · total only | 1.5 hrs | 1.3 | 12 |
| 59 | Sulphur Springs Valley E C Inc | AZ | Live · total only | 1.5 hrs | 0.8 | 4 |
| 60 | Eastern Iowa Light & Power Coop | IA | Live · total only | 1.5 hrs | 0.9 | 12 |
| 61 | Valley Electric Assn, Inc | NV | Live · total only | 1.5 hrs | 0.8 | 6 |
| 62 | Consumers Energy Coop - (IA) | IA | Live · total only | 1.6 hrs | 0.7 | 5 |
| 63 | Northern Virginia Elec Coop | VA | Live · total only | 1.6 hrs | 1.0 | 7 |
| 64 | Black Hills Colorado Electric, LLC | CO | Live · total only | 1.6 hrs | 0.9 | 7 |
| 65 | Black River Electric Coop, Inc - (SC) | SC | Live · total only | 1.6 hrs | 1.1 | 4 |
| 66 | Butler County Rural Elec Coop - (IA) | IA | Live · total only | 1.6 hrs | 1.5 | 7 |
| 67 | East Central Energy | MN | Live · total only | 1.6 hrs | 1.0 | 14 |
| 68 | Unitil Energy Systems | MA | Outages only | 1.6 hrs | 1.4 | 4 |
| 69 | People's Cooperative Services | MN | Live · total only | 1.7 hrs | 1.2 | 6 |
| 70 | Cherryland Electric Coop Inc | MI | Live · total only | 1.7 hrs | 0.9 | 6 |
| 71 | Johnson City - (TN) | TN | Live · total only | 1.7 hrs | 0.9 | 4 |
| 72 | Indian Electric Coop, Inc | OK | Live · total only | 1.7 hrs | 0.6 | 7 |
| 73 | Polk-Burnett Electric Coop | WI | Live · total only | 1.7 hrs | 1.5 | 6 |
| 74 | Edgecombe-Martin County E M C | NC | Live · total only | 1.7 hrs | 1.2 | 8 |
| 75 | Mississippi Power Co | MS | Live · total only | 1.8 hrs | 1.0 | 23 |
| 76 | Withlacoochee River Elec Coop | FL | Live · total only | 1.8 hrs | 1.4 | 5 |
| 77 | Stearns Cooperative Elec Assn | MN | Live · total only | 1.8 hrs | 1.0 | 6 |
| 78 | Delmarva Power | MD | Live · total only | 1.8 hrs | 0.8 | 13 |
| 79 | Adams-Columbia Electric Coop | WI | Live · total only | 1.8 hrs | 0.9 | 12 |
| 80 | Town of High Point | NC | Live · total only | 1.8 hrs | 1.4 | 4 |
| 81 | West Central Electric Coop Inc - (MO) | MO | Live · total only | 1.8 hrs | 0.9 | 5 |
| 82 | The Toledo Edison Co | OH | Live · total only | 1.8 hrs | 1.0 | 10 |
| 83 | City of San Antonio - (TX) | TX | Live · total only | 1.8 hrs | 1.5 | 8 |
| 84 | McKenzie Electric Coop Inc | ND | Live · total only | 1.8 hrs | 0.9 | 7 |
| 85 | Wiregrass Electric Coop, Inc | AL | Live · total only | 1.9 hrs | 1.5 | 6 |
| 86 | Tampa Electric Co | FL | Live · total only | 1.9 hrs | 1.8 | 4 |
| 87 | NSTAR Electric Company | MA | Live · total only | 1.9 hrs | 0.8 | 11 |
| 88 | Bluebonnet Electric Coop, Inc | TX | Live · total only | 1.9 hrs | 1.3 | 14 |
| 89 | Berkeley Electric Coop Inc | SC | Live · total only | 1.9 hrs | 1.4 | 3 |
| 90 | Imperial Irrigation District | CA | No live feed | 1.9 hrs | 0.7 | 3 |
| 91 | Delta Montrose Electric Assn | CO | Live · total only | 1.9 hrs | 1.0 | 4 |
| 92 | Mountrail-Williams Elec Coop | ND | Live · total only | 1.9 hrs | 1.2 | 7 |
| 93 | Federated Rural Electric Assn | MN | No live feed | 1.9 hrs | 1.2 | 11 |
| 94 | Grand Valley Power | CO | Live · total only | 1.9 hrs | - | 3 |
| 95 | Heartland Power Coop | IA | Live · total only | 1.9 hrs | 0.9 | 12 |
| 96 | Carteret-Craven El Member Corp | NC | Live · total only | 2.0 hrs | 1.5 | 4 |
| 97 | Oakdale Electric Coop | WI | Live · total only | 2.0 hrs | 1.1 | 5 |
| 98 | NorthWestern Energy - (SD) | SD | Live · total only | 2.0 hrs | 1.1 | 27 |
| 99 | Coast Electric Power Assn - (MS) | MS | Outages only | 2.0 hrs | 1.7 | 3 |
| 100 | Johnson County Rural E M C | IN | No live feed | 2.0 hrs | 1.2 | 4 |
Rankings use IEEE-standard SAIDI (with major event days) from the US EIA Form 861, limited to utilities serving 3+ counties so one storm can't swing a tiny co-op to the top. See the full provider reliability hub or our methodology.