Ontario County power outages

New York outage history from 2015 to 2023, with the largest outages and a backup battery estimate.

Ontario County, New York had 14 major outages from 2015 to 2023

Below middle outage time among US counties

Residents here averaged 0.52 times the US outage time per person and 0.85 times the New York rate. It ranks 54 of 61 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

1.6major outages per year
8 of 9years with a major outage
45 hrslongest major outage
Dec, Junhardest months

December and June made up 26% of this county's outage time. The largest outage on record began Dec 23, 2022, reached 8,873 customers, and left at least 200 customers out for 44.8 hours.

Outage time per resident, rated New York counties
MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

0
100K
200K
300K
400K
2015'152016'162017'172018'182019'192020'202021'212022'222023'23
Show yearly numbers
YearCustomer-hoursReported outagesMajor outages
2015117,078800
2016139,327631
2017130,043722
2018155,704802
2019130,124821
2020123,890841
2021160,454873
2022237,920942
2023108,414732

When outages hit

Share of this county's customer-hours by month.

0%
5%
10%
15%
20%
JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start dateHoursPeak customersCustomer-hours
Dec 23, 202244.88,87390,450
Apr 4, 201832.04,58764,392
Jun 16, 202225.07,49043,586
Dec 12, 202122.53,50042,489
Dec 10, 20201.221,72622,486

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

Look up another county

Counties ranked nearby

How to read this

  • A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
  • Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
  • Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.