County annual report · FIPS 12089
2025 Nassau County, FL Power Outage Report
In 2025, customers in Nassau County, FL went without power for an average of 2.9 hours, a total of 153K customer-hours (Florida average 2.1 hours). That ranks 18th worst of 67 Florida counties and 2083rd of 3,000 nationally.
Compared with FL, the US and 2024
Coverage line is EAGLE-I's share of Florida customers tracked each year.
Biggest outages in Nassau County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 22, 2025 03:00 | January 23, 2025 23:30 | 1d 20h | 5,635 | 76K |
| 2 | October 1, 2025 21:45 | October 2, 2025 18:00 | 20h 15m | 4,090 | 1,711 |
| 3 | January 6, 2025 16:00 | January 6, 2025 22:00 | 6h | 1,897 | 1,358 |
| 4 | March 18, 2025 19:30 | March 19, 2025 02:15 | 6h 45m | 1,840 | 467 |
| 5 | June 27, 2025 20:30 | June 27, 2025 22:00 | 1h 30m | 1,657 | 860 |
| 6 | December 19, 2025 18:30 | December 19, 2025 20:15 | 1h 45m | 1,653 | 2,452 |
| 7 | February 15, 2025 13:30 | February 15, 2025 18:30 | 5h | 1,636 | 2,468 |
| 8 | June 28, 2025 19:30 | June 28, 2025 21:00 | 1h 30m | 1,580 | 1,621 |
| 9 | January 13, 2025 13:45 | January 13, 2025 21:00 | 7h 15m | 1,206 | 1,233 |
| 10 | April 29, 2025 17:00 | April 29, 2025 20:45 | 3h 45m | 1,164 | 294 |
Outage episodes by size in 2025: 72 reached 100+ customers, 10 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 2025, 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 | 2024 | 11.7 hrs | 1.04 | 46 min | 0.44 |
| Okefenoke Rural El Member Corp | 2024 | 29.0 hrs | 4.60 | 3.5 hrs | 2.85 |
| 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 n/a of Florida's customers in 2025; 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, 2025, 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/2025/florida/nassau-county