County annual report · FIPS 36089
2021 St. Lawrence County, NY Power Outage Report
In 2021, customers in St. Lawrence County, NY went without power for an average of 5.5 hours, a total of 319K customer-hours (New York average 2.7 hours). That ranks 27th worst of 62 New York counties and 1233rd 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 St. Lawrence 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 20:00 | December 15, 2021 01:45 | 3d 5h | 8,769 | 173K |
| 2 | July 20, 2021 19:30 | July 22, 2021 07:30 | 1d 12h | 5,845 | 46K |
| 3 | September 16, 2021 13:45 | September 16, 2021 14:30 | 45m | 3,937 | 2,520 |
| 4 | August 19, 2021 13:30 | August 20, 2021 00:45 | 11h 15m | 3,933 | 4,233 |
| 5 | September 19, 2021 17:45 | September 20, 2021 01:45 | 8h | 2,708 | 11K |
| 6 | July 16, 2021 23:15 | July 17, 2021 03:15 | 4h | 2,012 | 507 |
| 7 | June 15, 2021 02:45 | June 15, 2021 04:15 | 1h 30m | 1,637 | 2,455 |
| 8 | November 11, 2021 23:30 | November 12, 2021 01:00 | 1h 30m | 1,593 | 414 |
| 9 | July 26, 2021 15:30 | July 27, 2021 03:30 | 12h | 1,520 | 3,235 |
| 10 | May 26, 2021 20:30 | May 27, 2021 00:45 | 4h 15m | 1,390 | 1,445 |
Outage episodes by size in 2021: 77 reached 100+ customers, 14 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 St. Lawrence 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 |
|---|---|---|---|---|---|
| Niagara Mohawk Power Corp. | 2021 | 3.7 hrs | 1.32 | 2.2 hrs | 1.12 |
| Town of Massena - (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 ÷ 57,536 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. St. Lawrence County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Lawrence 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/st-lawrence-county