County annual report · FIPS 28127
2021 Simpson County, MS Power Outage Report
In 2021, customers in Simpson County, MS went without power for an average of 25.7 hours, a total of 406K customer-hours (Mississippi average 17.2 hours). That ranks 24th worst of 78 Mississippi counties and 336th 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 Simpson 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 12:00 | February 21, 2021 21:00 | 6d 9h | 6,502 | 260K |
| 2 | August 30, 2021 06:00 | September 1, 2021 22:45 | 2d 16h | 3,605 | 66K |
| 3 | May 3, 2021 14:15 | May 6, 2021 18:30 | 3d 4h | 2,745 | 21K |
| 4 | May 20, 2021 13:45 | May 20, 2021 23:45 | 10h | 1,400 | 1,945 |
| 5 | April 21, 2021 08:00 | April 21, 2021 12:15 | 4h 15m | 1,206 | 4,955 |
| 6 | April 7, 2021 13:45 | April 7, 2021 19:45 | 6h | 1,117 | 985 |
| 7 | August 26, 2021 21:15 | August 28, 2021 23:00 | 2d 1h | 1,085 | 5,558 |
| 8 | July 16, 2021 15:30 | July 17, 2021 01:15 | 9h 45m | 977 | 2,266 |
| 9 | June 8, 2021 01:30 | June 8, 2021 09:30 | 8h | 910 | 1,694 |
| 10 | October 16, 2021 05:30 | October 16, 2021 10:00 | 4h 30m | 683 | 1,221 |
Outage episodes by size in 2021: 48 reached 100+ customers, 7 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 Simpson 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 | - | - | - | - | - |
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 ÷ 15,818 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. Simpson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Simpson 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/simpson-county