County annual report · FIPS 24027
2021 Howard County, MD Power Outage Report
In 2021, customers in Howard County, MD went without power for an average of 1.3 hours, a total of 195K customer-hours (Maryland average 2.5 hours). That ranks 19th worst of 24 Maryland counties and 2531st 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 Howard 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 28, 2021 18:30 | June 29, 2021 01:15 | 6h 45m | 3,398 | 5,807 |
| 2 | May 26, 2021 00:15 | May 30, 2021 02:15 | 4d 2h | 3,076 | 10K |
| 3 | July 6, 2021 15:30 | July 9, 2021 03:45 | 2d 12h | 2,806 | 2,599 |
| 4 | August 13, 2021 09:15 | August 16, 2021 03:00 | 2d 17h | 2,767 | 23K |
| 5 | April 10, 2021 10:30 | April 10, 2021 17:45 | 7h 15m | 2,446 | 1,194 |
| 6 | October 25, 2021 23:00 | November 1, 2021 13:15 | 6d 14h | 1,867 | 14K |
| 7 | July 17, 2021 11:30 | July 17, 2021 12:45 | 1h 15m | 1,857 | 1,124 |
| 8 | August 9, 2021 20:00 | August 13, 2021 05:00 | 3d 9h | 1,836 | 9,562 |
| 9 | April 21, 2021 14:00 | April 24, 2021 20:30 | 3d 6h | 1,805 | 3,973 |
| 10 | April 29, 2021 15:00 | April 29, 2021 17:30 | 2h 30m | 1,667 | 426 |
Outage episodes by size in 2021: 80 reached 100+ customers, 16 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 Howard 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 ÷ 146,094 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. Howard County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Howard 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/howard-county