County annual report · FIPS 06055
2021 Napa County, CA Power Outage Report
In 2021, customers in Napa County, CA went without power for an average of 10.6 hours, a total of 677K customer-hours (California average 6.6 hours). That ranks 25th worst of 57 California counties and 744th of 2,974 nationally.
Compared with CA, the US and 2020
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Napa 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 | August 18, 2021 01:30 | August 19, 2021 07:15 | 1d 5h | 8,080 | 95K |
| 2 | June 15, 2021 14:45 | June 15, 2021 20:15 | 5h 30m | 5,706 | 1,474 |
| 3 | February 24, 2021 14:45 | February 26, 2021 03:30 | 1d 12h | 5,645 | 9,763 |
| 4 | October 11, 2021 00:00 | October 13, 2021 03:30 | 2d 3h | 5,544 | 118K |
| 5 | June 14, 2021 10:45 | June 14, 2021 21:30 | 10h 45m | 4,911 | 2,605 |
| 6 | October 18, 2021 02:45 | October 18, 2021 17:30 | 14h 45m | 4,591 | 5,203 |
| 7 | July 31, 2021 00:15 | August 2, 2021 07:15 | 2d 7h | 4,573 | 60K |
| 8 | December 15, 2021 07:30 | December 16, 2021 19:00 | 1d 11h | 3,501 | 8,395 |
| 9 | October 21, 2021 14:45 | October 21, 2021 22:15 | 7h 30m | 3,473 | 5,762 |
| 10 | February 3, 2021 16:00 | February 3, 2021 22:45 | 6h 45m | 3,259 | 2,228 |
Outage episodes by size in 2021: 139 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 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 |
|---|---|---|---|---|---|
| Pacific Gas & Electric Co. | 2021 | 10.4 hrs | 1.84 | 3.6 hrs | 1.32 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of California's customers in 2021; 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, 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/california/napa-county