County annual report · FIPS 10005
2023 Sussex County, DE Power Outage Report
In 2023, customers in Sussex County, DE went without power for an average of 1.2 hours, a total of 256K customer-hours (Delaware average 2.3 hours). That ranks 2nd worst of 3 Delaware counties and 2610th of 2,977 nationally.
Compared with DE, the US and 2022
Coverage line is EAGLE-I's share of Delaware customers tracked each year.
Biggest outages in Sussex 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 | November 1, 2023 11:45 | November 1, 2023 17:15 | 5h 30m | 7,969 | 2,084 |
| 2 | December 12, 2023 10:45 | December 13, 2023 00:30 | 13h 45m | 6,943 | 3,561 |
| 3 | September 23, 2023 01:45 | September 24, 2023 02:15 | 1d | 3,615 | 16K |
| 4 | July 28, 2023 18:30 | July 30, 2023 09:15 | 1d 14h | 3,316 | 7,560 |
| 5 | March 30, 2023 07:45 | March 31, 2023 02:00 | 18h 15m | 3,133 | 3,467 |
| 6 | December 11, 2023 01:30 | December 11, 2023 12:45 | 11h 15m | 3,043 | 6,856 |
| 7 | May 23, 2023 12:00 | May 23, 2023 21:00 | 9h | 2,873 | 4,716 |
| 8 | July 3, 2023 18:30 | July 5, 2023 01:30 | 1d 7h | 2,756 | 5,330 |
| 9 | April 1, 2023 20:45 | April 3, 2023 06:15 | 1d 9h | 2,690 | 12K |
| 10 | April 6, 2023 12:00 | April 7, 2023 16:45 | 1d 4h | 2,482 | 6,812 |
Outage episodes by size in 2023: 167 reached 100+ customers, 31 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 Sussex 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 |
|---|---|---|---|---|---|
| Delmarva Power | 2023 | 2.1 hrs | 0.76 | 58 min | 0.60 |
| Delaware Electric Cooperative | 2023 | 83 min | 1.29 | 68 min | 1.13 |
| 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 n/a of Delaware's customers in 2023; 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, 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/delaware/sussex-county