County annual report · FIPS 24021
2020 Frederick County, MD Power Outage Report
In 2020, customers in Frederick County, MD went without power for an average of 2.0 hours, a total of 266K customer-hours (Maryland average 2.2 hours). That ranks 18th worst of 24 Maryland counties and 2250th of 3,019 nationally.
Compared with MD, the US and 2019
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Frederick County, 2020
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 23, 2020 21:30 | August 25, 2020 03:45 | 1d 6h | 6,917 | 23K |
| 2 | February 7, 2020 12:30 | February 9, 2020 04:00 | 1d 15h | 5,478 | 41K |
| 3 | November 1, 2020 17:00 | November 3, 2020 09:00 | 1d 16h | 3,878 | 15K |
| 4 | July 27, 2020 09:30 | July 28, 2020 05:30 | 20h | 3,741 | 1,220 |
| 5 | April 13, 2020 11:30 | April 15, 2020 02:15 | 1d 14h | 3,639 | 13K |
| 6 | May 29, 2020 06:45 | May 30, 2020 05:45 | 23h | 3,564 | 5,582 |
| 7 | April 24, 2020 11:30 | April 24, 2020 12:45 | 1h 15m | 3,525 | 3,744 |
| 8 | November 15, 2020 18:45 | November 17, 2020 03:30 | 1d 8h | 2,622 | 12K |
| 9 | March 4, 2020 04:15 | March 4, 2020 22:15 | 18h | 2,051 | 6,914 |
| 10 | November 24, 2020 14:15 | November 24, 2020 19:15 | 5h | 2,050 | 2,495 |
Outage episodes by size in 2020: 126 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 2020, 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 | 2020 | 2.4 hrs | 1.00 | 2.3 hrs | 0.99 |
| 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 98% of Maryland's customers in 2020; 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, 2020, 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/2020/maryland/frederick-county