County annual report · FIPS 10005
2021 Sussex County, DE Power Outage Report
In 2021, customers in Sussex County, DE went without power for an average of 1.1 hours, a total of 234K customer-hours (Delaware average 1.3 hours). That ranks 2nd worst of 3 Delaware counties and 2631st of 2,974 nationally.
Compared with DE, the US and 2020
Coverage line is EAGLE-I's share of Delaware customers tracked each year.
Biggest outages in Sussex 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 | April 30, 2021 12:15 | May 1, 2021 19:45 | 1d 7h | 13,804 | 13K |
| 2 | September 19, 2021 09:30 | September 19, 2021 11:45 | 2h 15m | 12,296 | 9,694 |
| 3 | June 20, 2021 11:45 | June 21, 2021 06:45 | 19h | 7,799 | 6,287 |
| 4 | June 27, 2021 12:15 | June 28, 2021 03:45 | 15h 30m | 6,221 | 7,919 |
| 5 | August 15, 2021 03:45 | August 15, 2021 09:00 | 5h 15m | 5,675 | 2,649 |
| 6 | May 29, 2021 09:30 | May 30, 2021 04:45 | 19h 15m | 3,612 | 5,709 |
| 7 | February 8, 2021 14:15 | February 8, 2021 21:45 | 7h 30m | 3,220 | 3,117 |
| 8 | June 22, 2021 13:30 | June 22, 2021 14:15 | 45m | 3,198 | 802 |
| 9 | March 8, 2021 13:15 | March 8, 2021 17:15 | 4h | 3,182 | 2,268 |
| 10 | February 22, 2021 11:15 | February 22, 2021 17:45 | 6h 30m | 3,180 | 3,509 |
Outage episodes by size in 2021: 159 reached 100+ customers, 41 reached 1,000+ customers, 2 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 Sussex 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 |
|---|---|---|---|---|---|
| Delmarva Power | 2021 | 63 min | 0.82 | 63 min | 0.82 |
| Delaware Electric Cooperative | 2021 | 78 min | 1.47 | 78 min | 1.47 |
| City of Milford - (DE) | - | - | - | - | - |
| City of Lewes - (DE) | - | - | - | - | - |
| City of Seaford- (DE) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 86% of Delaware's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 218,986 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. Sussex County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sussex County, DE 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/delaware/sussex-county