County annual report · FIPS 24009
2018 Calvert County, MD Power Outage Report
In 2018, customers in Calvert County, MD went without power for an average of 6.5 hours, a total of 257K customer-hours (Maryland average 5.5 hours). That ranks 7th worst of 23 Maryland counties and 838th of 2,798 nationally.
Compared with MD, the US and 2017
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Calvert County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2018 07:00 | March 6, 2018 01:00 | 3d 18h | 5,613 | 155K |
| 2 | October 12, 2018 01:30 | October 13, 2018 06:45 | 1d 5h | 2,923 | 15K |
| 3 | May 26, 2018 22:30 | May 28, 2018 07:45 | 1d 9h | 2,584 | 2,321 |
| 4 | May 13, 2018 01:15 | May 13, 2018 10:00 | 8h 45m | 2,491 | 2,664 |
| 5 | July 21, 2018 15:00 | July 22, 2018 15:45 | 1d | 2,342 | 6,625 |
| 6 | October 27, 2018 02:45 | October 27, 2018 07:30 | 4h 45m | 2,240 | 2,109 |
| 7 | June 5, 2018 23:00 | June 6, 2018 08:15 | 9h 15m | 1,751 | 2,619 |
| 8 | October 31, 2018 12:15 | October 31, 2018 19:00 | 6h 45m | 1,474 | 1,850 |
| 9 | March 21, 2018 15:15 | March 22, 2018 18:30 | 1d 3h | 1,444 | 3,076 |
| 10 | June 2, 2018 00:15 | June 2, 2018 21:15 | 21h | 1,309 | 1,092 |
Outage episodes by size in 2018: 69 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 2018, 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 | 2018 | 7.2 hrs | 1.32 | 1.6 hrs | 0.95 |
| 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 2018; 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, 2018, 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/2018/maryland/calvert-county