County annual report · FIPS 24037
2024 St. Mary's County, MD Power Outage Report
In 2024, customers in St. Mary's County, MD went without power for an average of 3.3 hours, a total of 184K customer-hours (Maryland average 2.8 hours). That ranks 7th worst of 24 Maryland counties and 2020th of 2,990 nationally.
Compared with MD, the US and 2023
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in St. Mary's County, 2024
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 29, 2024 01:30 | February 29, 2024 11:15 | 9h 45m | 12,061 | 7,311 |
| 2 | January 9, 2024 19:15 | January 11, 2024 01:30 | 1d 6h | 4,771 | 26K |
| 3 | June 12, 2024 17:30 | June 13, 2024 00:00 | 6h 30m | 3,858 | 7,193 |
| 4 | June 26, 2024 20:15 | June 28, 2024 10:30 | 1d 14h | 3,040 | 18K |
| 5 | May 4, 2024 13:15 | May 4, 2024 15:30 | 2h 15m | 2,668 | 1,042 |
| 6 | April 11, 2024 11:15 | April 11, 2024 17:30 | 6h 15m | 2,550 | 3,278 |
| 7 | June 30, 2024 17:30 | July 1, 2024 14:45 | 21h 15m | 2,447 | 12K |
| 8 | December 7, 2024 13:00 | December 7, 2024 22:30 | 9h 30m | 1,631 | 4,272 |
| 9 | March 7, 2024 17:30 | March 7, 2024 23:00 | 5h 30m | 1,624 | 7,711 |
| 10 | April 12, 2024 06:15 | April 12, 2024 18:45 | 12h 30m | 1,602 | 5,816 |
Outage episodes by size in 2024: 87 reached 100+ customers, 19 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 St. Mary's County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| Southern Maryland Elec Coop Inc | 2024 | 2.4 hrs | 1.31 | 1.9 hrs | 1.13 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Maryland's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 55,898 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. St. Mary's County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Mary's County, MD annual power outage report, 2024, 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/2024/maryland/st-marys-county