County annual report · FIPS 24025
2021 Harford County, MD Power Outage Report
In 2021, customers in Harford County, MD went without power for an average of 2.1 hours, a total of 236K customer-hours (Maryland average 2.5 hours). That ranks 15th worst of 24 Maryland counties and 2182nd 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 Harford 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 5, 2021 13:15 | June 8, 2021 10:15 | 2d 21h | 4,931 | 11K |
| 2 | November 14, 2021 03:15 | November 14, 2021 19:15 | 16h | 4,350 | 5,522 |
| 3 | October 28, 2021 21:30 | October 31, 2021 14:15 | 2d 16h | 3,307 | 31K |
| 4 | September 1, 2021 14:00 | September 4, 2021 02:45 | 2d 12h | 2,448 | 25K |
| 5 | April 30, 2021 16:15 | May 2, 2021 10:30 | 1d 18h | 2,421 | 11K |
| 6 | June 20, 2021 08:45 | June 25, 2021 03:45 | 4d 19h | 1,741 | 8,558 |
| 7 | August 10, 2021 23:15 | August 12, 2021 18:15 | 1d 19h | 1,555 | 6,339 |
| 8 | July 20, 2021 12:15 | July 21, 2021 23:15 | 1d 11h | 1,478 | 1,889 |
| 9 | March 28, 2021 22:30 | March 31, 2021 18:00 | 2d 19h | 1,201 | 6,373 |
| 10 | April 22, 2021 11:45 | April 22, 2021 14:00 | 2h 15m | 1,175 | 301 |
Outage episodes by size in 2021: 90 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 Harford 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 |
|---|---|---|---|---|---|
| Delmarva Power | 2021 | 63 min | 0.82 | 63 min | 0.82 |
| 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 ÷ 112,536 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. Harford County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Harford 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/harford-county