County annual report · FIPS 24037
2017 St. Mary's County, MD Power Outage Report
In 2017, customers in St. Mary's County, MD went without power for an average of 2.4 hours, a total of 136K customer-hours (Maryland average 1.9 hours). That ranks 9th worst of 24 Maryland counties and 1505th of 2,786 nationally.
Compared with MD, the US and 2016
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in St. Mary's County, 2017
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 25, 2017 05:00 | May 26, 2017 05:00 | 1d | 10,961 | 10K |
| 2 | August 8, 2017 09:45 | August 9, 2017 02:30 | 16h 45m | 8,093 | 5,604 |
| 3 | March 14, 2017 07:00 | March 15, 2017 23:00 | 1d 16h | 2,561 | 10K |
| 4 | June 19, 2017 12:15 | June 20, 2017 08:15 | 20h | 2,006 | 7,890 |
| 5 | July 6, 2017 07:15 | July 6, 2017 21:00 | 13h 45m | 1,915 | 3,077 |
| 6 | July 14, 2017 03:45 | July 15, 2017 08:30 | 1d 4h | 1,827 | 4,062 |
| 7 | August 21, 2017 20:15 | August 22, 2017 05:45 | 9h 30m | 1,734 | 5,334 |
| 8 | January 23, 2017 06:45 | January 24, 2017 01:45 | 19h | 1,468 | 4,925 |
| 9 | July 25, 2017 18:00 | July 25, 2017 20:00 | 2h | 1,354 | 1,017 |
| 10 | September 13, 2017 11:15 | September 13, 2017 18:15 | 7h | 1,295 | 480 |
Outage episodes by size in 2017: 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 2017, 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 n/a of Maryland's customers in 2017; 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, 2017, 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/2017/maryland/st-marys-county