County annual report · FIPS 24021
2019 Frederick County, MD Power Outage Report
In 2019, customers in Frederick County, MD went without power for an average of 3.3 hours, a total of 439K customer-hours (Maryland average 2.6 hours). That ranks 5th worst of 24 Maryland counties and 1533rd 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 Frederick 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 | August 18, 2019 23:00 | August 22, 2019 03:15 | 3d 4h | 6,196 | 29K |
| 2 | July 21, 2019 21:45 | July 25, 2019 06:45 | 3d 9h | 5,674 | 45K |
| 3 | May 30, 2019 19:00 | June 1, 2019 07:00 | 1d 12h | 5,151 | 16K |
| 4 | October 20, 2019 13:45 | October 20, 2019 22:45 | 9h | 4,903 | 8,774 |
| 5 | October 31, 2019 11:45 | November 3, 2019 02:45 | 2d 15h | 4,825 | 48K |
| 6 | July 17, 2019 10:45 | July 18, 2019 18:30 | 1d 7h | 3,978 | 8,397 |
| 7 | November 15, 2019 12:30 | November 15, 2019 23:15 | 10h 45m | 3,683 | 3,440 |
| 8 | May 5, 2019 10:45 | May 6, 2019 19:30 | 1d 8h | 3,526 | 9,211 |
| 9 | March 23, 2019 16:30 | March 24, 2019 09:15 | 16h 45m | 2,277 | 17K |
| 10 | February 12, 2019 02:00 | February 15, 2019 04:00 | 3d 2h | 2,161 | 29K |
Outage episodes by size in 2019: 142 reached 100+ customers, 29 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 Frederick 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 |
|---|---|---|---|---|---|
| The Potomac Edison Company | 2018 | 5.1 hrs | 1.34 | 2.5 hrs | 1.08 |
| Thurmont Municipal Light Co | - | - | - | - | - |
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 ÷ 132,173 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. Frederick County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Frederick 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2019/maryland/frederick-county