County annual report · FIPS 24021
2018 Frederick County, MD Power Outage Report
In 2018, customers in Frederick County, MD went without power for an average of 3.0 hours, a total of 390K customer-hours (Maryland average 5.5 hours). That ranks 19th worst of 23 Maryland counties and 1526th of 2,798 nationally.
Compared with MD, the US and 2017
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Frederick County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2018 04:15 | March 6, 2018 01:00 | 3d 20h | 7,301 | 181K |
| 2 | July 17, 2018 18:15 | July 18, 2018 23:15 | 1d 5h | 2,474 | 11K |
| 3 | July 21, 2018 11:30 | July 25, 2018 21:30 | 4d 10h | 2,261 | 9,258 |
| 4 | June 18, 2018 11:30 | June 19, 2018 07:30 | 20h | 2,240 | 2,478 |
| 5 | February 7, 2018 18:00 | February 9, 2018 03:15 | 1d 9h | 2,030 | 14K |
| 6 | August 3, 2018 23:30 | August 6, 2018 03:15 | 2d 3h | 1,637 | 9,633 |
| 7 | July 3, 2018 13:15 | July 4, 2018 15:15 | 1d 2h | 1,599 | 7,392 |
| 8 | June 1, 2018 21:30 | June 2, 2018 20:00 | 22h 30m | 1,543 | 2,011 |
| 9 | November 15, 2018 20:30 | November 17, 2018 02:45 | 1d 6h | 1,463 | 4,601 |
| 10 | September 19, 2018 13:30 | September 19, 2018 18:45 | 5h 15m | 1,438 | 1,322 |
Outage episodes by size in 2018: 112 reached 100+ customers, 16 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 2018, 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 98% of Maryland's customers in 2018; 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, 2018, 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/2018/maryland/frederick-county