County annual report · FIPS 36059
2019 Nassau County, NY Power Outage Report
In 2019, customers in Nassau County, NY went without power for an average of 2.0 hours, a total of 851K customer-hours (New York average 3.0 hours). That ranks 57th worst of 62 New York counties and 2051st of 2,945 nationally.
Compared with NY, the US and 2018
Coverage line is EAGLE-I's share of New York customers tracked each year.
Biggest outages in Nassau County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 16, 2019 10:00 | July 27, 2019 18:15 | 11d 8h | 15,328 | 138K |
| 2 | October 31, 2019 02:00 | November 5, 2019 12:00 | 5d 10h | 13,854 | 159K |
| 3 | August 21, 2019 11:00 | August 25, 2019 09:30 | 3d 22h | 6,706 | 72K |
| 4 | June 2, 2019 09:30 | June 4, 2019 06:45 | 1d 21h | 5,182 | 14K |
| 5 | October 16, 2019 12:45 | October 19, 2019 08:15 | 2d 19h | 4,909 | 72K |
| 6 | February 1, 2019 04:45 | February 1, 2019 10:45 | 6h | 4,467 | 2,924 |
| 7 | July 27, 2019 19:00 | August 4, 2019 06:45 | 7d 11h | 3,955 | 17K |
| 8 | September 12, 2019 10:45 | September 12, 2019 19:00 | 8h 15m | 3,729 | 1,602 |
| 9 | August 7, 2019 12:45 | August 10, 2019 07:15 | 2d 18h | 3,524 | 20K |
| 10 | February 24, 2019 15:45 | February 28, 2019 05:45 | 3d 14h | 3,358 | 21K |
Outage episodes by size in 2019: 218 reached 100+ customers, 58 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 Nassau County reported on EIA Form 861 for 2019, 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) | 2018 | 9 min | 0.27 | 9 min | 0.27 |
| 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 98% of New York's customers in 2019; 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, 2019, 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/2019/new-york/nassau-county