County annual report · FIPS 42091
2021 Montgomery County, PA Power Outage Report
In 2021, customers in Montgomery County, PA went without power for an average of 12.8 hours, a total of 2.9M customer-hours (Pennsylvania average 4.1 hours). That ranks 8th worst of 67 Pennsylvania counties and 647th of 2,974 nationally.
Compared with PA, the US and 2020
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Montgomery County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 17, 2021 12:00 | August 1, 2021 01:00 | 14d 13h | 49,121 | 835K |
| 2 | September 1, 2021 02:00 | September 26, 2021 01:45 | 24d 23h | 44,233 | 1.3M |
| 3 | July 6, 2021 09:45 | July 12, 2021 02:45 | 5d 17h | 7,634 | 43K |
| 4 | October 28, 2021 03:15 | November 4, 2021 19:00 | 7d 15h | 6,433 | 61K |
| 5 | August 16, 2021 10:30 | August 29, 2021 22:45 | 13d 12h | 4,266 | 80K |
| 6 | April 28, 2021 10:45 | May 5, 2021 08:45 | 6d 22h | 3,664 | 35K |
| 7 | December 11, 2021 00:15 | December 13, 2021 03:00 | 2d 2h | 3,324 | 16K |
| 8 | March 25, 2021 20:45 | March 26, 2021 02:00 | 5h 15m | 2,747 | 737 |
| 9 | October 25, 2021 12:00 | October 28, 2021 02:15 | 2d 14h | 2,693 | 18K |
| 10 | December 1, 2021 12:00 | December 9, 2021 09:30 | 7d 21h | 2,490 | 28K |
Outage episodes by size in 2021: 146 reached 100+ customers, 37 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 2021, 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 |
|---|---|---|---|---|---|
| PPL Electric Utilities Corp | 2021 | 2.9 hrs | 0.93 | 85 min | 0.64 |
| Metropolitan Edison Co | 2021 | 5.1 hrs | 1.52 | 3.1 hrs | 1.26 |
| PECO Energy Co | 2021 | 3.1 hrs | 1.01 | 88 min | 0.83 |
| FirstEnergy Pennsylvania Electric Co | - | - | - | - | - |
| Borough of Hatfield- (PA) | - | - | - | - | - |
| Borough of Lansdale | - | - | - | - | - |
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 Pennsylvania's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 224,080 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, PA annual power outage report, 2021, 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/2021/pennsylvania/montgomery-county