County annual report · FIPS 36059
2018 Nassau County, NY Power Outage Report
In 2018, customers in Nassau County, NY went without power for an average of 4.3 hours, a total of 1.8M customer-hours (New York average 7.4 hours). That ranks 43rd worst of 60 New York counties and 1182nd of 2,798 nationally.
Compared with NY, the US and 2017
Coverage line is EAGLE-I's share of New York customers tracked each year.
Biggest outages in Nassau County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2018 09:30 | March 6, 2018 01:00 | 3d 15h | 45,945 | 733K |
| 2 | March 6, 2018 03:15 | March 23, 2018 05:15 | 17d 2h | 18,528 | 361K |
| 3 | October 31, 2018 12:15 | November 1, 2018 03:45 | 15h 30m | 16,205 | 5,357 |
| 4 | October 10, 2018 07:00 | October 10, 2018 09:00 | 2h | 7,677 | 4,364 |
| 5 | August 6, 2018 11:45 | August 11, 2018 08:00 | 4d 20h | 7,277 | 53K |
| 6 | July 16, 2018 08:15 | July 18, 2018 23:00 | 2d 14h | 5,546 | 19K |
| 7 | November 15, 2018 11:45 | November 19, 2018 06:15 | 3d 18h | 5,285 | 63K |
| 8 | October 15, 2018 12:15 | October 17, 2018 03:45 | 1d 15h | 4,727 | 6,971 |
| 9 | September 4, 2018 10:15 | September 8, 2018 07:15 | 3d 21h | 4,717 | 23K |
| 10 | May 15, 2018 08:00 | May 21, 2018 02:00 | 5d 18h | 4,668 | 24K |
Outage episodes by size in 2018: 184 reached 100+ customers, 66 reached 1,000+ customers, 3 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 2018, 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 2018; 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, 2018, 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/2018/new-york/nassau-county