County annual report · FIPS 24037
2022 St. Mary's County, MD Power Outage Report
In 2022, customers in St. Mary's County, MD went without power for an average of 7.8 hours, a total of 435K customer-hours (Maryland average 5.5 hours). That ranks 6th worst of 24 Maryland counties and 934th of 2,976 nationally.
Compared with MD, the US and 2021
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in St. Mary's County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 3, 2022 11:00 | January 7, 2022 14:45 | 4d 3h | 14,054 | 243K |
| 2 | July 25, 2022 21:15 | July 26, 2022 09:30 | 12h 15m | 10,669 | 9,826 |
| 3 | May 8, 2022 01:00 | May 8, 2022 13:00 | 12h | 10,531 | 3,593 |
| 4 | July 12, 2022 20:15 | July 14, 2022 04:00 | 1d 7h | 8,280 | 38K |
| 5 | June 9, 2022 00:45 | June 9, 2022 17:15 | 16h 30m | 6,039 | 5,924 |
| 6 | August 16, 2022 22:15 | August 24, 2022 15:30 | 7d 17h | 5,989 | 8,928 |
| 7 | December 23, 2022 14:30 | December 24, 2022 03:45 | 13h 15m | 4,434 | 11K |
| 8 | July 21, 2022 13:15 | July 21, 2022 23:30 | 10h 15m | 2,915 | 3,620 |
| 9 | September 12, 2022 11:15 | September 12, 2022 16:00 | 4h 45m | 2,694 | 1,188 |
| 10 | May 15, 2022 03:00 | May 15, 2022 11:45 | 8h 45m | 2,207 | 11K |
Outage episodes by size in 2022: 89 reached 100+ customers, 21 reached 1,000+ customers, 3 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 2022, 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 | 2022 | 8.2 hrs | 1.96 | 1.9 hrs | 1.32 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of Maryland's customers in 2022; 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, 2022, 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/2022/maryland/st-marys-county