County annual report · FIPS 36103
2021 Suffolk County, NY Power Outage Report
In 2021, customers in Suffolk County, NY went without power for an average of 1.2 hours, a total of 800K customer-hours (New York average 2.7 hours). That ranks 57th worst of 62 New York counties and 2582nd of 2,974 nationally.
Compared with NY, the US and 2020
Coverage line is EAGLE-I's share of New York customers tracked each year.
Biggest outages in Suffolk 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 | November 12, 2021 10:00 | November 18, 2021 04:15 | 5d 18h | 10,109 | 106K |
| 2 | September 1, 2021 11:00 | September 8, 2021 06:45 | 6d 19h | 9,343 | 102K |
| 3 | September 23, 2021 12:00 | September 26, 2021 07:15 | 2d 19h | 6,423 | 18K |
| 4 | February 1, 2021 07:30 | February 4, 2021 04:45 | 2d 21h | 5,276 | 31K |
| 5 | March 29, 2021 08:00 | March 31, 2021 07:15 | 1d 23h | 3,930 | 5,050 |
| 6 | August 25, 2021 10:30 | September 1, 2021 09:30 | 6d 23h | 3,854 | 40K |
| 7 | July 6, 2021 10:15 | July 12, 2021 06:30 | 5d 20h | 3,594 | 40K |
| 8 | May 22, 2021 12:00 | May 25, 2021 07:15 | 2d 19h | 3,444 | 6,758 |
| 9 | March 12, 2021 11:30 | March 14, 2021 07:30 | 1d 20h | 2,906 | 3,050 |
| 10 | October 25, 2021 09:30 | October 29, 2021 05:45 | 3d 20h | 2,812 | 22K |
Outage episodes by size in 2021: 216 reached 100+ customers, 72 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 Suffolk 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 |
|---|---|---|---|---|---|
| Long Island Power Authority | - | - | - | - | - |
| Fishers Island Utility Co Inc | - | - | - | - | - |
| Village of Greenport - (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 99% of New York's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 657,677 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. Suffolk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Suffolk County, NY 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/). https://massoutage.com/reports/2021/new-york/suffolk-county