County annual report · FIPS 06055
2023 Napa County, CA Power Outage Report
In 2023, customers in Napa County, CA went without power for an average of 11.9 hours, a total of 758K customer-hours (California average 7.9 hours). That ranks 27th worst of 57 California counties and 718th of 2,977 nationally.
Compared with CA, the US and 2022
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Napa County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 24, 2023 05:45 | March 13, 2023 15:45 | 17d 10h | 6,591 | 218K |
| 2 | March 21, 2023 14:45 | March 25, 2023 16:45 | 4d 2h | 6,283 | 20K |
| 3 | January 3, 2023 07:00 | January 10, 2023 01:00 | 6d 18h | 5,324 | 63K |
| 4 | November 6, 2023 17:45 | November 7, 2023 13:00 | 19h 15m | 5,265 | 15K |
| 5 | October 5, 2023 00:00 | October 6, 2023 09:15 | 1d 9h | 4,845 | 8,135 |
| 6 | October 8, 2023 14:00 | October 10, 2023 04:45 | 1d 14h | 4,733 | 12K |
| 7 | November 27, 2023 16:45 | November 28, 2023 05:15 | 12h 30m | 3,496 | 2,614 |
| 8 | June 12, 2023 13:30 | June 13, 2023 13:30 | 1d | 3,464 | 4,048 |
| 9 | November 21, 2023 15:30 | November 22, 2023 12:00 | 20h 30m | 3,406 | 6,247 |
| 10 | August 21, 2023 16:00 | August 25, 2023 10:15 | 3d 18h | 3,317 | 20K |
Outage episodes by size in 2023: 150 reached 100+ customers, 33 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 2023, 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. | 2023 | 11.9 hrs | 2.22 | 4.3 hrs | 1.56 |
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 2023; 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, 2023, 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/2023/california/napa-county