County annual report · FIPS 24009
2020 Calvert County, MD Power Outage Report
In 2020, customers in Calvert County, MD went without power for an average of 6.6 hours, a total of 260K customer-hours (Maryland average 2.2 hours). That ranks 1st worst of 24 Maryland counties and 1143rd of 3,019 nationally.
Compared with MD, the US and 2019
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Calvert County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 4, 2020 09:45 | August 6, 2020 02:00 | 1d 16h | 11,675 | 139K |
| 2 | July 6, 2020 22:00 | July 7, 2020 23:15 | 1d 1h | 8,457 | 22K |
| 3 | August 9, 2020 13:45 | August 10, 2020 06:30 | 16h 45m | 7,137 | 8,870 |
| 4 | February 7, 2020 14:00 | February 8, 2020 02:30 | 12h 30m | 4,048 | 15K |
| 5 | November 1, 2020 23:45 | November 2, 2020 20:45 | 21h | 3,313 | 8,524 |
| 6 | April 13, 2020 09:30 | April 14, 2020 03:30 | 18h | 2,604 | 9,783 |
| 7 | March 14, 2020 06:45 | March 14, 2020 21:00 | 14h 15m | 1,652 | 6,613 |
| 8 | September 23, 2020 06:15 | September 23, 2020 08:00 | 1h 45m | 1,232 | 1,849 |
| 9 | April 9, 2020 18:45 | April 9, 2020 23:15 | 4h 30m | 1,038 | 786 |
| 10 | December 4, 2020 21:00 | December 5, 2020 03:15 | 6h 15m | 931 | 2,465 |
Outage episodes by size in 2020: 49 reached 100+ customers, 9 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 Calvert County reported on EIA Form 861 for 2020, 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 | 2020 | 2.0 hrs | 0.96 | 78 min | 0.78 |
| Southern Maryland Elec Coop Inc | - | - | - | - | - |
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 Maryland's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 39,458 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. Calvert County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Calvert County, MD annual power outage report, 2020, 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/2020/maryland/calvert-county