County annual report · FIPS 36059
2023 Nassau County, NY Power Outage Report
In 2023, customers in Nassau County, NY went without power for an average of 1.4 hours, a total of 602K customer-hours (New York average 2.2 hours). That ranks 53rd worst of 62 New York counties and 2518th of 2,977 nationally.
Compared with NY, the US and 2022
Coverage line is EAGLE-I's share of New York customers tracked each year.
Biggest outages in Nassau 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 | December 12, 2023 13:00 | December 14, 2023 04:45 | 1d 15h | 20,536 | 32K |
| 2 | December 18, 2023 05:45 | December 20, 2023 08:15 | 2d 2h | 5,417 | 57K |
| 3 | November 16, 2023 13:45 | November 16, 2023 17:00 | 3h 15m | 5,367 | 2,095 |
| 4 | August 13, 2023 06:15 | August 15, 2023 02:00 | 1d 19h | 4,944 | 28K |
| 5 | December 5, 2023 13:30 | December 6, 2023 00:15 | 10h 45m | 4,156 | 1,414 |
| 6 | May 20, 2023 10:15 | May 22, 2023 04:30 | 1d 18h | 4,065 | 8,309 |
| 7 | September 1, 2023 03:15 | September 1, 2023 05:45 | 2h 30m | 3,862 | 3,223 |
| 8 | October 29, 2023 11:45 | October 29, 2023 21:45 | 10h | 3,584 | 2,018 |
| 9 | February 2, 2023 14:15 | February 3, 2023 05:15 | 15h | 3,490 | 1,847 |
| 10 | March 17, 2023 12:00 | March 17, 2023 22:30 | 10h 30m | 3,316 | 1,484 |
Outage episodes by size in 2023: 286 reached 100+ customers, 52 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 Nassau 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 |
|---|---|---|---|---|---|
| Village of Freeport - (NY) | 2023 | 7 min | 0.09 | 7 min | 0.09 |
| Long Island Power Authority | - | - | - | - | - |
| Village of Rockville Centre - (NY) | - | - | - | - | - |
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 New York's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 427,483 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. Nassau County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Nassau County, NY 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/new-york/nassau-county