County annual report · FIPS 24031
2019 Montgomery County, MD Power Outage Report
In 2019, customers in Montgomery County, MD went without power for an average of 1.8 hours, a total of 718K customer-hours (Maryland average 2.6 hours). That ranks 19th worst of 24 Maryland counties and 2126th 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 Montgomery 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 | May 23, 2019 11:00 | May 25, 2019 03:45 | 1d 16h | 23,950 | 84K |
| 2 | October 31, 2019 12:45 | November 3, 2019 00:15 | 2d 11h | 12,705 | 38K |
| 3 | July 2, 2019 11:00 | July 6, 2019 08:00 | 3d 21h | 6,378 | 48K |
| 4 | July 17, 2019 10:30 | July 19, 2019 08:15 | 1d 21h | 5,933 | 22K |
| 5 | June 2, 2019 21:15 | June 4, 2019 07:00 | 1d 9h | 5,146 | 14K |
| 6 | August 6, 2019 07:30 | August 8, 2019 06:00 | 1d 22h | 4,981 | 21K |
| 7 | July 19, 2019 19:45 | July 24, 2019 06:15 | 4d 10h | 4,454 | 41K |
| 8 | February 20, 2019 10:15 | February 20, 2019 23:45 | 13h 30m | 4,428 | 7,650 |
| 9 | July 11, 2019 11:00 | July 14, 2019 04:30 | 2d 17h | 4,424 | 15K |
| 10 | February 12, 2019 02:00 | February 15, 2019 04:30 | 3d 2h | 4,202 | 31K |
Outage episodes by size in 2019: 232 reached 100+ customers, 96 reached 1,000+ customers, 2 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 Montgomery 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 |
| Baltimore Gas & Electric Co | 2018 | 7.2 hrs | 1.32 | 1.6 hrs | 0.95 |
| Potomac Electric Power Co | 2018 | 2.5 hrs | 0.83 | 57 min | 0.67 |
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 ÷ 395,748 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery 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/montgomery-county