County annual report · FIPS 12089
2021 Nassau County, FL Power Outage Report
In 2021, customers in Nassau County, FL went without power for an average of 1.4 hours, a total of 75K customer-hours (Florida average 1.9 hours). That ranks 57th worst of 67 Florida counties and 2493rd of 2,974 nationally.
Compared with FL, the US and 2020
Coverage line is EAGLE-I's share of Florida customers tracked each year.
Biggest outages in Nassau 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 7, 2021 19:30 | July 8, 2021 10:30 | 15h | 3,495 | 4,444 |
| 2 | June 22, 2021 21:15 | June 23, 2021 03:30 | 6h 15m | 3,444 | 1,612 |
| 3 | September 8, 2021 16:00 | September 8, 2021 21:45 | 5h 45m | 3,006 | 1,794 |
| 4 | September 8, 2021 13:45 | September 8, 2021 15:15 | 1h 30m | 2,587 | 666 |
| 5 | October 3, 2021 07:30 | October 3, 2021 19:45 | 12h 15m | 2,487 | 4,560 |
| 6 | October 22, 2021 15:45 | October 22, 2021 19:45 | 4h | 2,434 | 2,063 |
| 7 | June 3, 2021 14:00 | June 3, 2021 18:30 | 4h 30m | 1,962 | 1,042 |
| 8 | October 2, 2021 14:45 | October 2, 2021 15:45 | 1h | 1,861 | 750 |
| 9 | February 3, 2021 22:15 | February 4, 2021 10:00 | 11h 45m | 1,855 | 1,333 |
| 10 | April 11, 2021 11:15 | April 11, 2021 16:45 | 5h 30m | 1,634 | 732 |
Outage episodes by size in 2021: 62 reached 100+ customers, 18 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 Nassau 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 |
|---|---|---|---|---|---|
| Florida Power & Light Co | 2021 | 55 min | 0.58 | 45 min | 0.51 |
| Okefenoke Rural El Member Corp | 2021 | 3.0 hrs | 2.36 | 3.0 hrs | 2.36 |
| Florida Public Utilities Co | - | - | - | - | - |
| JEA | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Florida's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 52,493 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. Nassau County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Nassau County, FL 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/florida/nassau-county