County annual report · FIPS 24033
2021 Prince George's County, MD Power Outage Report
In 2021, customers in Prince George's County, MD went without power for an average of 2.3 hours, a total of 799K customer-hours (Maryland average 2.5 hours). That ranks 14th worst of 24 Maryland counties and 2121st 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 Prince George's 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 29, 2021 08:45 | July 10, 2021 23:30 | 11d 14h | 21,198 | 257K |
| 2 | July 19, 2021 08:45 | July 22, 2021 06:30 | 2d 21h | 6,567 | 34K |
| 3 | May 25, 2021 06:00 | May 30, 2021 08:45 | 5d 2h | 6,393 | 41K |
| 4 | July 28, 2021 11:15 | July 31, 2021 08:15 | 2d 21h | 5,444 | 14K |
| 5 | October 26, 2021 07:15 | October 31, 2021 09:45 | 5d 2h | 4,580 | 21K |
| 6 | April 28, 2021 07:15 | May 2, 2021 04:00 | 3d 20h | 3,829 | 23K |
| 7 | August 9, 2021 11:45 | August 16, 2021 03:15 | 6d 15h | 3,809 | 50K |
| 8 | May 18, 2021 20:45 | May 20, 2021 02:00 | 1d 5h | 3,793 | 6,949 |
| 9 | June 10, 2021 07:30 | June 11, 2021 05:15 | 21h 45m | 3,791 | 2,326 |
| 10 | March 26, 2021 07:30 | March 29, 2021 21:45 | 3d 14h | 2,935 | 10K |
Outage episodes by size in 2021: 168 reached 100+ customers, 46 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 Prince George's 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 |
|---|---|---|---|---|---|
| Baltimore Gas & Electric Co | 2021 | 2.4 hrs | 1.02 | 77 min | 0.77 |
| Southern Maryland Elec Coop Inc | 2021 | 2.7 hrs | 1.56 | 2.0 hrs | 1.30 |
| Potomac Electric Power Co | 2021 | 64 min | 0.56 | 49 min | 0.49 |
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 ÷ 349,773 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. Prince George's County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Prince George's 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/prince-georges-county