County annual report · FIPS 24003
2021 Anne Arundel County, MD Power Outage Report
In 2021, customers in Anne Arundel County, MD went without power for an average of 2.6 hours, a total of 664K customer-hours (Maryland average 2.5 hours). That ranks 10th worst of 24 Maryland counties and 1992nd 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 Anne Arundel 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 | June 30, 2021 10:00 | July 31, 2021 06:45 | 30d 20h | 23,020 | 226K |
| 2 | April 30, 2021 11:15 | May 3, 2021 11:30 | 3d | 9,948 | 66K |
| 3 | April 18, 2021 15:15 | April 23, 2021 10:45 | 4d 19h | 6,999 | 23K |
| 4 | March 3, 2021 12:30 | March 4, 2021 11:45 | 23h 15m | 5,472 | 8,822 |
| 5 | September 1, 2021 08:45 | September 25, 2021 07:45 | 23d 23h | 4,511 | 92K |
| 6 | October 28, 2021 09:15 | October 31, 2021 19:45 | 3d 10h | 3,792 | 17K |
| 7 | May 4, 2021 08:00 | May 11, 2021 02:00 | 6d 18h | 2,699 | 13K |
| 8 | June 8, 2021 12:00 | June 12, 2021 13:45 | 4d 1h | 2,217 | 7,432 |
| 9 | February 23, 2021 15:00 | February 26, 2021 06:45 | 2d 15h | 2,195 | 2,861 |
| 10 | January 31, 2021 06:45 | February 5, 2021 02:15 | 4d 19h | 2,189 | 27K |
Outage episodes by size in 2021: 86 reached 100+ customers, 20 reached 1,000+ customers, 1 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 Anne Arundel 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 |
|---|---|---|---|---|---|
| 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 ÷ 253,751 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. Anne Arundel County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Anne Arundel 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/anne-arundel-county