County annual report · FIPS 24009
2023 Calvert County, MD Power Outage Report
In 2023, customers in Calvert County, MD went without power for an average of 2.7 hours, a total of 105K customer-hours (Maryland average 3.6 hours). That ranks 13th worst of 24 Maryland counties and 2061st of 2,977 nationally.
Compared with MD, the US and 2022
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Calvert County, 2023
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 7, 2023 12:15 | December 7, 2023 22:45 | 10h 30m | 7,592 | 11K |
| 2 | December 13, 2023 00:45 | December 25, 2023 11:15 | 12d 10h | 5,563 | 7,504 |
| 3 | July 29, 2023 19:30 | July 31, 2023 14:30 | 1d 19h | 3,680 | 22K |
| 4 | September 28, 2023 20:15 | September 28, 2023 21:30 | 1h 15m | 1,271 | 954 |
| 5 | August 18, 2023 13:00 | August 18, 2023 18:45 | 5h 45m | 1,039 | 1,847 |
| 6 | June 21, 2023 12:45 | June 22, 2023 02:30 | 13h 45m | 1,023 | 1,964 |
| 7 | August 30, 2023 20:30 | August 31, 2023 19:15 | 22h 45m | 993 | 1,586 |
| 8 | September 9, 2023 01:45 | September 10, 2023 18:15 | 1d 16h | 956 | 1,667 |
| 9 | April 1, 2023 10:30 | April 3, 2023 16:15 | 2d 5h | 946 | 6,305 |
| 10 | December 3, 2023 09:45 | December 3, 2023 17:30 | 7h 45m | 877 | 1,322 |
Outage episodes by size in 2023: 46 reached 100+ customers, 6 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 Calvert County reported on EIA Form 861 for 2023, 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 | 2023 | 3.2 hrs | 0.96 | 60 min | 0.69 |
| Southern Maryland Elec Coop Inc | 2023 | 3.4 hrs | 1.33 | 1.7 hrs | 1.09 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Maryland's customers in 2023; 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, 2023, 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/2023/maryland/calvert-county