County annual report · FIPS 28147
2021 Walthall County, MS Power Outage Report
In 2021, customers in Walthall County, MS went without power for an average of 66.7 hours, a total of 461K customer-hours (Mississippi average 17.2 hours). That ranks 9th worst of 78 Mississippi counties and 122nd of 2,974 nationally.
Compared with MS, the US and 2020
Coverage line is EAGLE-I's share of Mississippi customers tracked each year.
Biggest outages in Walthall County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 15, 2021 10:30 | February 20, 2021 19:15 | 5d 8h | 6,121 | 254K |
| 2 | August 29, 2021 18:30 | September 6, 2021 23:15 | 8d 4h | 3,737 | 133K |
| 3 | April 10, 2021 05:15 | April 12, 2021 23:00 | 2d 17h | 1,849 | 39K |
| 4 | March 24, 2021 21:30 | March 25, 2021 03:00 | 5h 30m | 1,090 | 2,630 |
| 5 | May 4, 2021 21:30 | May 5, 2021 18:45 | 21h 15m | 946 | 1,656 |
| 6 | March 17, 2021 22:45 | March 18, 2021 18:45 | 20h | 674 | 4,511 |
| 7 | August 19, 2021 19:00 | August 19, 2021 20:15 | 1h 15m | 654 | 391 |
| 8 | June 4, 2021 12:15 | June 4, 2021 15:30 | 3h 15m | 614 | 371 |
| 9 | June 5, 2021 11:45 | June 5, 2021 13:30 | 1h 45m | 578 | 868 |
| 10 | July 18, 2021 12:15 | July 18, 2021 18:00 | 5h 45m | 497 | 627 |
Outage episodes by size in 2021: 33 reached 100+ customers, 4 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Walthall County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Entergy Mississippi LLC | 2021 | 22.9 hrs | 2.44 | 4.7 hrs | 1.50 |
| Pearl River Valley El Pwr Assn | 2021 | 6.8 hrs | 2.45 | 2.5 hrs | 1.80 |
| Magnolia Electric Power Assn | 2021 | 89.6 hrs | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 77% of Mississippi's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,910 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Walthall County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Walthall County, MS annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/mississippi/walthall-county