County annual report · FIPS 28121
2021 Rankin County, MS Power Outage Report
In 2021, customers in Rankin County, MS went without power for an average of 7.6 hours, a total of 642K customer-hours (Mississippi average 17.2 hours). That ranks 42nd worst of 78 Mississippi counties and 976th 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 Rankin 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 | May 4, 2021 15:45 | May 7, 2021 01:15 | 2d 9h | 13,830 | 102K |
| 2 | February 15, 2021 09:45 | February 21, 2021 02:15 | 5d 16h | 9,040 | 210K |
| 3 | June 6, 2021 18:15 | June 6, 2021 21:45 | 3h 30m | 7,006 | 1,810 |
| 4 | May 1, 2021 05:30 | May 1, 2021 06:15 | 45m | 6,989 | 3,396 |
| 5 | August 11, 2021 12:45 | August 12, 2021 01:30 | 12h 45m | 6,302 | 3,932 |
| 6 | August 29, 2021 17:45 | September 3, 2021 00:30 | 4d 6h | 5,752 | 96K |
| 7 | April 1, 2021 10:45 | April 13, 2021 23:15 | 12d 12h | 4,729 | 31K |
| 8 | May 9, 2021 21:30 | May 11, 2021 01:15 | 1d 3h | 4,103 | 10K |
| 9 | July 2, 2021 15:00 | July 3, 2021 02:45 | 11h 45m | 3,616 | 4,506 |
| 10 | November 4, 2021 04:00 | November 4, 2021 05:00 | 1h | 3,589 | 3,589 |
Outage episodes by size in 2021: 137 reached 100+ customers, 29 reached 1,000+ customers, 1 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 Rankin 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 |
| Southern Pine Electric Cooperative | - | - | - | - | - |
| Central Electric Power Assn - (MS) | - | - | - | - | - |
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 ÷ 84,285 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. Rankin County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rankin 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/rankin-county