County annual report · FIPS 24037
2015 St. Mary's County, MD Power Outage Report
In 2015, customers in St. Mary's County, MD went without power for an average of 2.5 hours, a total of 140K customer-hours (Maryland average 2.0 hours). That ranks 9th worst of 24 Maryland counties and 1061st of 2,484 nationally.
Compared with MD, the US
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in St. Mary's County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 22, 2015 13:00 | September 22, 2015 17:00 | 4h | 20,346 | 12K |
| 2 | April 7, 2015 17:00 | April 7, 2015 19:00 | 2h | 8,653 | 5,612 |
| 3 | December 5, 2015 07:00 | December 5, 2015 13:15 | 6h 15m | 3,972 | 4,284 |
| 4 | June 21, 2015 00:30 | June 21, 2015 20:45 | 20h 15m | 2,759 | 10K |
| 5 | June 27, 2015 18:45 | June 28, 2015 23:30 | 1d 4h | 2,505 | 8,747 |
| 6 | February 15, 2015 00:00 | February 16, 2015 01:45 | 1d 1h | 1,911 | 15K |
| 7 | November 17, 2015 14:30 | November 17, 2015 15:15 | 45m | 1,682 | 422 |
| 8 | March 18, 2015 05:15 | March 18, 2015 18:00 | 12h 45m | 1,546 | 7,568 |
| 9 | July 1, 2015 04:00 | July 1, 2015 21:15 | 17h 15m | 1,527 | 3,474 |
| 10 | May 12, 2015 20:00 | May 12, 2015 20:15 | 15m | 1,442 | 361 |
Outage episodes by size in 2015: 74 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 2015, 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 2015; 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, 2015, 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/2015/maryland/st-marys-county