County annual report · FIPS 24031
2025 Montgomery County, MD Power Outage Report
In 2025, customers in Montgomery County, MD went without power for an average of 2.9 hours, a total of 1.2M customer-hours (Maryland average 4.2 hours). That ranks 17th worst of 24 Maryland counties and 2087th of 3,000 nationally.
Compared with MD, the US and 2024
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Montgomery County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 18, 2025 06:00 | June 30, 2025 04:30 | 11d 22h | 29,030 | 340K |
| 2 | May 16, 2025 09:15 | May 21, 2025 04:15 | 4d 19h | 14,073 | 86K |
| 3 | July 29, 2025 10:15 | August 3, 2025 07:30 | 4d 21h | 10,941 | 21K |
| 4 | February 16, 2025 05:00 | February 21, 2025 07:45 | 5d 2h | 9,668 | 101K |
| 5 | April 27, 2025 21:00 | April 30, 2025 21:45 | 3d | 5,929 | 8,164 |
| 6 | July 14, 2025 20:30 | July 19, 2025 03:00 | 4d 6h | 5,700 | 27K |
| 7 | March 16, 2025 19:00 | March 18, 2025 22:45 | 2d 3h | 5,513 | 24K |
| 8 | December 29, 2025 09:00 | December 31, 2025 11:00 | 2d 2h | 4,617 | 21K |
| 9 | May 27, 2025 10:15 | May 27, 2025 21:30 | 11h 15m | 4,101 | 7,935 |
| 10 | July 7, 2025 10:15 | July 12, 2025 03:15 | 4d 17h | 4,015 | 27K |
Outage episodes by size in 2025: 174 reached 100+ customers, 59 reached 1,000+ customers, 3 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 2025, 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 | 2024 | 3.7 hrs | 1.32 | 3.4 hrs | 1.28 |
| Baltimore Gas & Electric Co | 2024 | 2.2 hrs | 0.80 | 67 min | 0.63 |
| Potomac Electric Power Co | 2024 | 49 min | 0.43 | 36 min | 0.38 |
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 2025; 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, 2025, 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/2025/maryland/montgomery-county