County annual report · FIPS 24013
2021 Carroll County, MD Power Outage Report
In 2021, customers in Carroll County, MD went without power for an average of 3.0 hours, a total of 216K customer-hours (Maryland average 2.5 hours). That ranks 6th worst of 24 Maryland counties and 1825th of 2,974 nationally.
Compared with MD, the US and 2020
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Carroll 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 | December 2, 2021 14:00 | December 3, 2021 23:15 | 1d 9h | 3,352 | 8,443 |
| 2 | May 26, 2021 20:15 | May 28, 2021 04:30 | 1d 8h | 2,799 | 17K |
| 3 | February 11, 2021 03:15 | February 11, 2021 04:15 | 1h | 2,605 | 1,049 |
| 4 | June 30, 2021 11:15 | July 2, 2021 22:45 | 2d 11h | 2,081 | 17K |
| 5 | June 21, 2021 01:00 | June 25, 2021 00:30 | 3d 23h | 1,603 | 10K |
| 6 | August 10, 2021 11:30 | August 13, 2021 03:15 | 2d 15h | 1,550 | 11K |
| 7 | August 31, 2021 09:15 | September 4, 2021 01:00 | 3d 15h | 1,540 | 21K |
| 8 | December 10, 2021 17:00 | December 11, 2021 06:30 | 13h 30m | 1,530 | 19K |
| 9 | July 7, 2021 13:15 | July 8, 2021 08:15 | 19h | 1,323 | 772 |
| 10 | August 3, 2021 00:15 | August 3, 2021 15:30 | 15h 15m | 1,292 | 1,723 |
Outage episodes by size in 2021: 80 reached 100+ customers, 13 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 Carroll 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 |
|---|---|---|---|---|---|
| The Potomac Edison Company | 2021 | 3.3 hrs | 1.26 | 2.9 hrs | 1.20 |
| Baltimore Gas & Electric Co | 2021 | 2.4 hrs | 1.02 | 77 min | 0.77 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of Maryland's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 71,073 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. Carroll County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Carroll County, MD 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/maryland/carroll-county