How reliable is the power in Mississippi?
Mississippi ranks 43rd of 45 states without major events and 31st with them (1st = fewest minutes), 120 above the U.S. 129 and 146 below the U.S. 662. Major events added 266 minutes, 52% of the with-events total. The figure covers 970,266 customers, 62% of the 1,554,209 EIA lists for Mississippi.
Mississippi with and without major events
minutes without power per customer, 2024, Mississippi and U.S.
- 250Mississippi, no major events
- 129U.S., no major events
- 516Mississippi, with major events
- 662U.S., with major events
| Measure | Mississippi without | Mississippi with | U.S. without | U.S. with |
|---|---|---|---|---|
| SAIDI, minutes per customer | 250 | 516 | 129 | 662 |
| SAIFI, interruptions per customer | 1.88 | 2.48 | 1.06 | 1.53 |
| CAIDI, minutes per interruption | 133 | 208 | 122 | 433 |
| Median utility, SAIDI minutes | 240 | 325 | — | — |
Which Mississippi utilities move the number
Entergy Mississippi LLC serves 48% of the customers in the Mississippi figure: 64% of lost customer-minutes with major events, 64% without. Without Entergy Mississippi LLC, the weighted figure would be 353 minutes with major events and 174 without, against 516 and 250.
- Entergy Mississippi LLC: 465,518 customers (48%), 332 min without and 692 with; 64% of lost minutes with major events, 64% without.
- Southern Pine Electric Cooperative: 70,097 customers (7%), 321 min without and 1,003 with; 14% of lost minutes with major events, 9% without.
- Coast Electric Power Assn - (MS): 90,258 customers (9%), 103 min without and 277 with; 5% of lost minutes with major events, 4% without.
All Mississippi utilities in the 2024 file
46 utilities in the 2024 EIA-861 files for Mississippi: 13 follow IEEE 1366, 7 use another method, 26 filed no reliability figures. 20 are listed.
| City of Columbus - (MS) | Municipal | IEEE 1366 | 12,752 | 30 | 53 | 0.48 | 0.76 | 44 | 1 of 10 | — |
|---|---|---|---|---|---|---|---|---|---|---|
| City of Oxford - (MS) | Municipal | IEEE 1366 | 10,497 | 35 | 47 | 0.72 | 0.80 | 25 | 2 of 10 | — |
| Mississippi Power Co | Investor Owned | IEEE 1366 | 191,210 | 82 | 124 | 0.91 | 1.12 | 34 | 3 of 10 | — |
| Coast Electric Power Assn - (MS) | Cooperative | IEEE 1366 | 90,258 | 103 | 277 | 1.41 | 2.41 | 63 | 4 of 10 | — |
| Pearl River Valley El Pwr Assn | Cooperative | IEEE 1366 | 53,555 | 238 | 372 | 2.91 | 3.32 | 36 | 5 of 10 | — |
| Northcentral Mississippi E P A | Cooperative | IEEE 1366 | 34,435 | 241 | 241 | 2.09 | 2.09 | 0 | 6 of 10 | — |
| Southern Pine Electric Cooperative | Cooperative | IEEE 1366 | 70,097 | 321 | 1,003 | 4.48 | 6.29 | 68 | 7 of 10 | — |
| Entergy Mississippi LLC | Investor Owned | IEEE 1366 | 465,518 | 332 | 692 | 1.75 | 2.31 | 52 | 8 of 10 | — |
| Delta Electric Power Assn | Cooperative | IEEE 1366 | 28,999 | 419 | 722 | 4.11 | 5.07 | 42 | 9 of 10 | — |
| East Mississippi Elec Pwr Assn | Cooperative | IEEE 1366 | 12,945 | 468 | 663 | 2.81 | 3.63 | 29 | 10 of 10 | — |
| Singing River Elec Cooperative | Cooperative | IEEE 1366 | 79,694 | 169 | 243 | — | — | — | Not ranked | — |
| 4-County Electric Power Assn | Cooperative | Other method | 50,612 | 124 | 215 | 1.57 | 1.95 | — | Not ranked | other method, not comparable |
| Dixie Electric Power Assn - (MS) | Cooperative | Other method | 41,139 | 197 | 262 | 2.03 | 2.31 | — | Not ranked | other method, not comparable |
| Central Electric Power Assn - (MS) | Cooperative | Other method | 38,975 | 321 | 808 | 4.60 | 6.08 | — | Not ranked | other method, not comparable |
| Magnolia Electric Power Assn | Cooperative | IEEE 1366 | 33,355 | — | 1,810 | — | — | — | Not ranked | — |
| North East Mississippi EPA | Cooperative | Other method | 28,997 | 257 | 463 | 1.26 | 1.70 | — | Not ranked | other method, not comparable |
| Tallahatchie Valley E P A | Cooperative | Other method | 28,517 | 364 | 488 | 3.70 | 4.50 | — | Not ranked | other method, not comparable |
| Southwest Mississippi E P A | Cooperative | IEEE 1366 | 25,416 | 1,750 | 3,672 | — | — | — | Not ranked | — |
| Alcorn County Elec Power Assn | Cooperative | Other method | 19,181 | 3 | 3 | 1.26 | 1.26 | — | Not ranked | other method, not comparable |
| City of Starkville | Municipal | Other method | 14,395 | 44 | 44 | 0.43 | 0.43 | — | Not ranked | other method, not comparable |
Mississippi utilities with no reliability figures
26 in the sales file, no SAIDI or SAIFI row; the 25 largest are listed.
| Utility | Type | Customers |
|---|---|---|
| Tombigbee Electric Power Assn | Cooperative | 45,859 |
| Pontotoc Electric Power Assn | Cooperative | 20,694 |
| Natchez Trace Elec Power Assn | Cooperative | 16,229 |
| City of Tupelo - (MS) | Municipal | 15,645 |
| Tippah Electric Power Assn | Cooperative | 14,297 |
| Prentiss County Elec Pwr Assn | Cooperative | 14,173 |
| Tishomingo County E P A | Cooperative | 13,911 |
| City of Holly Springs | Municipal | 12,012 |
| Monroe County Elec Power Assn | Cooperative | 11,820 |
| City of New Albany - (MS) | Municipal | 11,321 |
| Yazoo Valley Elec Power Assn | Cooperative | 10,493 |
| Greenwood Utilities Comm | Municipal | 8,887 |
| City of Okolona | Municipal | 5,390 |
| City of Amory | Municipal | 3,959 |
| City of West Point - (MS) | Municipal | 3,840 |
| City of Philadelphia - (MS) | Municipal | 3,839 |
| Louisville Electric System | Municipal | 3,462 |
| City of Aberdeen - (MS) | Municipal | 3,330 |
| City of Water Valley - (MS) | Municipal | 2,079 |
| City of Macon - (MS) | Municipal | 1,181 |
| Tennessee Valley Authority | Federal | 8 |
| City of Kosciusko - (MS) | Municipal | — |
| Coahoma Electric Power Assn | Cooperative | — |
| Twin County Electric Pwr Assn | Cooperative | — |
| Clarksdale Public Utilities | Municipal | — |
The biggest Mississippi utilities against the U.S.
- Entergy Mississippi LLC (investor owned, 30% of Mississippi customers in the file): SAIDI without major events 332 min, 202 above the U.S. 129; with major events 692 min against 662.
- Mississippi Power Co (investor owned, 12% of Mississippi customers in the file): SAIDI without major events 82 min, 47 below the U.S. 129; with major events 124 min against 662.
- Coast Electric Power Assn - (MS) (cooperative, 6% of Mississippi customers in the file): SAIDI without major events 103 min, 26 below the U.S. 129; with major events 277 min against 662.
- Singing River Elec Cooperative (cooperative, 5% of Mississippi customers in the file): SAIDI without major events 169 min, 40 above the U.S. 129; with major events 243 min against 662.
- Southern Pine Electric Cooperative (cooperative, 5% of Mississippi customers in the file): SAIDI without major events 321 min, 192 above the U.S. 129; with major events 1003 min against 662.
Mississippi by type of utility
Among Mississippi utilities that report under IEEE 1366, municipal utilities average 32 minutes without major events and investor owned utilities 259.
| Type | Utilities | Customers | SAIDI without | Median utility | SAIDI with |
|---|---|---|---|---|---|
| Investor Owned | 2 | 656,728 | 259 | 207 | 527 |
| Cooperative | 6 | 290,289 | 245 | 281 | 527 |
| Municipal | 2 | 23,249 | 32 | 33 | 50 |
Next to Mississippi in the ranking
Mississippi report card
Smart meters: 93% of residential meters, 24 utilities (U.S. 92%). Mississippi time-based rates: 3 of 25 utilities, 2.3% of residential customers enrolled (U.S. 10.6%). Mississippi efficiency spend: $16.5 per customer (U.S. $124.2). Demand response: 207 W per customer (U.S. 77). Mississippi net-metered systems: 1.2 per 1,000 customers. Rankings.
Is your Mississippi utility better or worse than the Mississippi median?
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- Mississippi against all states
- Mississippi utilities among the best and worst
- Mississippi utility reliability and price by company
- Mississippi major outage reports from the Department of Energy
- Mississippi electricity prices
- Mississippi help with your bill
20 Mississippi filings in EIA-861 2024 (retrieved 2026-10-01), 10 ranked utilities. Method and sources.
Questions
How many minutes without power did the average Mississippi customer have in 2024?
250 minutes without major events and 516 with them (13 IEEE 1366 utilities, customer-weighted).
Why do the two Mississippi numbers differ so much?
Major events add 266 of the 516 minutes (52%); Entergy Mississippi LLC supplies 64% of the with-events total.
Which Mississippi utility reported the fewest and the most minutes?
Among 10 utilities with 10,000+ customers: City of Columbus - (MS) 30 minutes without major events, and East Mississippi Elec Pwr Assn 468.
Which Mississippi utilities use which method?
13 follow IEEE 1366, 7 use another method, 26 filed no reliability figures.