County annual report · FIPS 28097
2021 Montgomery County, MS Power Outage Report
In 2021, customers in Montgomery County, MS went without power for an average of 3.6 hours, a total of 15K customer-hours (Mississippi average 17.2 hours). That ranks 58th worst of 78 Mississippi counties and 1652nd 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 Montgomery 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 17:00 | May 5, 2021 23:00 | 1d 6h | 213 | 1,170 |
| 2 | February 18, 2021 01:15 | February 20, 2021 14:15 | 2d 13h | 185 | 3,409 |
| 3 | October 7, 2021 22:00 | October 7, 2021 22:45 | 45m | 147 | 110 |
| 4 | October 24, 2021 12:45 | October 24, 2021 22:45 | 10h | 147 | 1,108 |
| 5 | June 21, 2021 17:15 | June 21, 2021 20:15 | 3h | 107 | 156 |
| 6 | November 17, 2021 12:45 | November 18, 2021 00:00 | 11h 15m | 106 | 568 |
| 7 | September 18, 2021 19:45 | September 18, 2021 20:45 | 1h | 105 | 105 |
| 8 | June 10, 2021 08:15 | June 10, 2021 18:45 | 10h 30m | 95 | 361 |
| 9 | December 17, 2021 14:30 | December 17, 2021 17:15 | 2h 45m | 94 | 92 |
| 10 | December 7, 2021 20:00 | December 7, 2021 23:30 | 3h 30m | 92 | 322 |
Outage episodes by size in 2021: 7 reached 100+ customers, 0 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 Montgomery 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 |
| Delta Electric Power Assn | 2021 | 64.6 hrs | 4.93 | 7.6 hrs | 4.19 |
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 ÷ 4,275 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery 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/montgomery-county