County annual report · FIPS 36063
2021 Niagara County, NY Power Outage Report
In 2021, customers in Niagara County, NY went without power for an average of 5.6 hours, a total of 595K customer-hours (New York average 2.7 hours). That ranks 25th worst of 62 New York counties and 1220th 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 Niagara 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 | December 11, 2021 17:00 | December 15, 2021 07:30 | 3d 14h | 24,256 | 413K |
| 2 | March 1, 2021 20:15 | March 2, 2021 08:30 | 12h 15m | 7,792 | 14K |
| 3 | September 8, 2021 10:00 | September 8, 2021 12:30 | 2h 30m | 7,379 | 3,692 |
| 4 | May 14, 2021 10:15 | May 14, 2021 22:15 | 12h | 4,942 | 10K |
| 5 | March 26, 2021 12:30 | March 27, 2021 20:15 | 1d 7h | 3,838 | 11K |
| 6 | July 13, 2021 23:00 | July 15, 2021 03:30 | 1d 4h | 3,137 | 9,104 |
| 7 | December 25, 2021 14:00 | December 25, 2021 18:15 | 4h 15m | 3,030 | 11K |
| 8 | August 18, 2021 04:30 | August 18, 2021 06:00 | 1h 30m | 2,978 | 4,236 |
| 9 | February 5, 2021 11:30 | February 5, 2021 23:00 | 11h 30m | 2,942 | 4,926 |
| 10 | June 15, 2021 14:30 | June 15, 2021 16:00 | 1h 30m | 2,865 | 4,298 |
Outage episodes by size in 2021: 86 reached 100+ customers, 24 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 Niagara 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 | - | - | - | - | - |
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 ÷ 106,178 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. Niagara County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Niagara 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/niagara-county