County annual report · FIPS 24009
2025 Calvert County, MD Power Outage Report
In 2025, customers in Calvert County, MD went without power for an average of 5.2 hours, a total of 207K customer-hours (Maryland average 4.2 hours). That ranks 8th worst of 24 Maryland counties and 1434th of 3,000 nationally.
Compared with MD, the US and 2024
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Calvert County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 16, 2025 13:30 | May 20, 2025 07:45 | 3d 18h | 8,498 | 70K |
| 2 | July 1, 2025 22:30 | July 3, 2025 00:15 | 1d 1h | 5,315 | 4,519 |
| 3 | March 8, 2025 15:30 | March 16, 2025 02:45 | 7d 11h | 3,946 | 7,454 |
| 4 | June 17, 2025 02:30 | June 17, 2025 04:45 | 2h 15m | 3,152 | 875 |
| 5 | April 15, 2025 19:15 | April 16, 2025 02:30 | 7h 15m | 2,751 | 4,073 |
| 6 | June 25, 2025 10:00 | June 27, 2025 01:15 | 1d 15h | 2,639 | 14K |
| 7 | June 19, 2025 13:45 | June 21, 2025 23:45 | 2d 10h | 2,433 | 9,756 |
| 8 | July 8, 2025 01:45 | July 11, 2025 00:45 | 2d 23h | 2,104 | 9,314 |
| 9 | May 31, 2025 02:00 | May 31, 2025 13:00 | 11h | 1,774 | 3,012 |
| 10 | February 16, 2025 16:30 | February 18, 2025 01:30 | 1d 9h | 1,709 | 12K |
Outage episodes by size in 2025: 67 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 Calvert County reported on EIA Form 861 for 2025, 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 | 2024 | 2.2 hrs | 0.80 | 67 min | 0.63 |
| Southern Maryland Elec Coop Inc | 2024 | 2.4 hrs | 1.31 | 1.9 hrs | 1.13 |
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 2025; 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, 2025, 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/2025/maryland/calvert-county