County annual report · FIPS 24031
2017 Montgomery County, MD Power Outage Report
In 2017, customers in Montgomery County, MD went without power for an average of 1.3 hours, a total of 500K customer-hours (Maryland average 1.9 hours). That ranks 22nd worst of 24 Maryland counties and 1927th of 2,786 nationally.
Compared with MD, the US and 2016
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Montgomery County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 11, 2017 13:30 | November 13, 2017 12:15 | 1d 22h | 7,948 | 10K |
| 2 | March 1, 2017 12:45 | March 3, 2017 10:15 | 1d 21h | 6,110 | 19K |
| 3 | July 22, 2017 11:30 | July 25, 2017 03:30 | 2d 16h | 4,631 | 27K |
| 4 | December 25, 2017 10:15 | December 25, 2017 21:30 | 11h 15m | 4,471 | 5,156 |
| 5 | February 13, 2017 03:00 | February 14, 2017 07:00 | 1d 4h | 4,399 | 34K |
| 6 | August 14, 2017 10:15 | August 14, 2017 14:00 | 3h 45m | 4,133 | 1,051 |
| 7 | March 24, 2017 12:00 | March 24, 2017 20:45 | 8h 45m | 3,835 | 1,502 |
| 8 | April 6, 2017 08:15 | April 7, 2017 22:30 | 1d 14h | 3,761 | 9,713 |
| 9 | January 23, 2017 05:45 | January 24, 2017 08:15 | 1d 2h | 3,635 | 22K |
| 10 | July 17, 2017 09:00 | July 19, 2017 05:30 | 1d 20h | 3,607 | 10K |
Outage episodes by size in 2017: 226 reached 100+ customers, 75 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 Montgomery County reported on EIA Form 861 for 2017, 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 | 2017 | 2.4 hrs | 1.01 | 2.3 hrs | 0.99 |
| Baltimore Gas & Electric Co | 2017 | 1.6 hrs | 0.83 | 74 min | 0.72 |
| Potomac Electric Power Co | 2017 | 62 min | 0.66 | 62 min | 0.66 |
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 2017; 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, 2017, 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/2017/maryland/montgomery-county