County annual report · FIPS 24037
2019 St. Mary's County, MD Power Outage Report
In 2019, customers in St. Mary's County, MD went without power for an average of 2.7 hours, a total of 149K customer-hours (Maryland average 2.6 hours). That ranks 8th worst of 24 Maryland counties and 1770th of 2,945 nationally.
Compared with MD, the US and 2018
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in St. Mary's County, 2019
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 20, 2019 12:30 | February 21, 2019 04:00 | 15h 30m | 6,830 | 4,035 |
| 2 | October 24, 2019 12:30 | October 24, 2019 19:15 | 6h 45m | 2,822 | 1,252 |
| 3 | October 31, 2019 22:15 | November 1, 2019 15:15 | 17h | 2,795 | 6,407 |
| 4 | March 22, 2019 04:00 | March 22, 2019 19:30 | 15h 30m | 2,462 | 6,047 |
| 5 | January 30, 2019 16:45 | January 31, 2019 02:15 | 9h 30m | 2,226 | 3,018 |
| 6 | June 17, 2019 20:15 | June 18, 2019 09:30 | 13h 15m | 2,189 | 8,793 |
| 7 | July 19, 2019 17:30 | July 20, 2019 05:45 | 12h 15m | 2,165 | 7,389 |
| 8 | June 11, 2019 07:30 | June 12, 2019 02:30 | 19h | 2,076 | 3,053 |
| 9 | June 18, 2019 10:45 | June 19, 2019 07:15 | 20h 30m | 1,758 | 3,939 |
| 10 | August 12, 2019 12:00 | August 13, 2019 01:15 | 13h 15m | 1,753 | 1,551 |
Outage episodes by size in 2019: 93 reached 100+ customers, 22 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 St. Mary's County reported on EIA Form 861 for 2019, 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 | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 97% of Maryland's customers in 2019; 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, 2019, 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/). https://massoutage.com/reports/2019/maryland/st-marys-county