County annual report · FIPS 28047
2021 Harrison County, MS Power Outage Report
In 2021, customers in Harrison County, MS went without power for an average of 2.9 hours, a total of 315K customer-hours (Mississippi average 17.2 hours). That ranks 63rd worst of 78 Mississippi counties and 1886th 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 Harrison 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 | June 13, 2021 03:15 | June 13, 2021 12:15 | 9h | 9,849 | 8,995 |
| 2 | August 27, 2021 17:15 | September 1, 2021 02:00 | 4d 8h | 8,247 | 91K |
| 3 | April 10, 2021 04:15 | April 14, 2021 18:30 | 4d 14h | 4,228 | 20K |
| 4 | June 18, 2021 18:15 | June 20, 2021 03:30 | 1d 9h | 4,104 | 7,944 |
| 5 | May 5, 2021 02:30 | May 6, 2021 03:00 | 1d | 3,251 | 9,431 |
| 6 | June 10, 2021 04:45 | June 11, 2021 01:15 | 20h 30m | 2,873 | 3,693 |
| 7 | February 12, 2021 14:15 | February 12, 2021 18:45 | 4h 30m | 2,843 | 721 |
| 8 | June 20, 2021 08:45 | June 20, 2021 18:45 | 10h | 2,759 | 10K |
| 9 | June 2, 2021 13:00 | June 2, 2021 19:15 | 6h 15m | 2,441 | 2,791 |
| 10 | July 12, 2021 12:00 | July 15, 2021 22:00 | 3d 10h | 2,373 | 1,598 |
Outage episodes by size in 2021: 147 reached 100+ customers, 35 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 Harrison 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 |
|---|---|---|---|---|---|
| Mississippi Power Co | 2021 | 5.9 hrs | 1.65 | 82 min | 1.01 |
| Singing River Elec Cooperative | 2021 | 3.8 hrs | - | 2.5 hrs | - |
| Coast Electric Power Assn - (MS) | 2021 | 13.4 hrs | 2.70 | 2.0 hrs | 1.84 |
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 ÷ 109,081 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. Harrison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Harrison 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/harrison-county