County annual report · FIPS 06055
2025 Napa County, CA Power Outage Report
In 2025, customers in Napa County, CA went without power for an average of 5.6 hours, a total of 359K customer-hours (California average 7.6 hours). That ranks 36th worst of 57 California counties and 1348th of 3,000 nationally.
Compared with CA, the US and 2024
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Napa 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 | November 12, 2025 16:15 | November 13, 2025 00:45 | 8h 30m | 8,938 | 4,766 |
| 2 | May 27, 2025 14:45 | May 28, 2025 13:45 | 23h | 4,220 | 6,888 |
| 3 | October 29, 2025 05:45 | October 30, 2025 05:15 | 23h 30m | 3,375 | 7,746 |
| 4 | May 5, 2025 08:45 | May 7, 2025 01:15 | 1d 16h | 3,316 | 30K |
| 5 | January 29, 2025 17:15 | January 31, 2025 06:15 | 1d 13h | 3,114 | 4,794 |
| 6 | May 15, 2025 20:30 | May 20, 2025 04:00 | 4d 7h | 2,812 | 7,952 |
| 7 | September 16, 2025 05:15 | September 18, 2025 15:00 | 2d 9h | 2,315 | 14K |
| 8 | June 18, 2025 14:45 | June 19, 2025 11:00 | 20h 15m | 2,158 | 7,188 |
| 9 | June 12, 2025 04:00 | June 12, 2025 06:00 | 2h | 2,132 | 1,382 |
| 10 | March 23, 2025 23:30 | March 24, 2025 00:30 | 1h | 1,783 | 654 |
Outage episodes by size in 2025: 146 reached 100+ customers, 29 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 Napa 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 |
|---|---|---|---|---|---|
| Pacific Gas & Electric Co. | 2024 | 8.5 hrs | 2.15 | 4.6 hrs | 1.82 |
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 California's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 63,828 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. Napa County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Napa County, CA 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/california/napa-county