County annual report · FIPS 36069
2021 Ontario County, NY Power Outage Report
In 2021, customers in Ontario County, NY went without power for an average of 2.5 hours, a total of 191K customer-hours (New York average 2.7 hours). That ranks 52nd worst of 62 New York counties and 2033rd 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 Ontario 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 | July 27, 2021 09:45 | July 27, 2021 10:00 | 15m | 4,760 | 1,190 |
| 2 | May 14, 2021 13:30 | May 14, 2021 20:30 | 7h | 4,707 | 7,771 |
| 3 | December 18, 2021 18:00 | December 18, 2021 19:00 | 1h | 4,344 | 1,093 |
| 4 | March 26, 2021 16:30 | March 28, 2021 15:45 | 1d 23h | 3,867 | 24K |
| 5 | July 24, 2021 12:45 | July 24, 2021 15:45 | 3h | 3,534 | 4,251 |
| 6 | December 11, 2021 22:45 | December 13, 2021 20:15 | 1d 21h | 3,500 | 44K |
| 7 | May 14, 2021 01:45 | May 14, 2021 04:45 | 3h | 2,920 | 3,050 |
| 8 | August 2, 2021 12:15 | August 2, 2021 20:45 | 8h 30m | 2,869 | 3,303 |
| 9 | August 29, 2021 19:00 | August 30, 2021 09:00 | 14h | 2,106 | 4,846 |
| 10 | June 21, 2021 20:15 | June 22, 2021 21:45 | 1d 1h | 2,089 | 16K |
Outage episodes by size in 2021: 99 reached 100+ customers, 17 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 Ontario 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 |
|---|---|---|---|---|---|
| New York State Elec & Gas Corp | 2016 | 4.5 hrs | 1.56 | 3.6 hrs | 1.47 |
| Niagara Mohawk Power Corp. | 2021 | 3.7 hrs | 1.32 | 2.2 hrs | 1.12 |
| AVANGRID | - | - | - | - | - |
| Rochester Gas & Electric Corp | - | - | - | - | - |
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 ÷ 75,985 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. Ontario County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ontario 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/new-york/ontario-county