County annual report · FIPS 06055
2018 Napa County, CA Power Outage Report
In 2018, customers in Napa County, CA went without power for an average of 5.1 hours, a total of 328K customer-hours (California average 3.7 hours). That ranks 15th worst of 57 California counties and 1028th of 2,798 nationally.
Compared with CA, the US and 2017
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Napa County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 15, 2018 01:45 | October 17, 2018 06:15 | 2d 4h | 6,550 | 171K |
| 2 | September 27, 2018 15:15 | September 29, 2018 00:15 | 1d 9h | 3,845 | 10K |
| 3 | September 13, 2018 15:45 | September 13, 2018 19:15 | 3h 30m | 3,830 | 5,198 |
| 4 | November 21, 2018 23:30 | November 24, 2018 09:00 | 2d 9h | 3,534 | 7,624 |
| 5 | September 19, 2018 15:15 | September 20, 2018 03:00 | 11h 45m | 3,462 | 1,981 |
| 6 | June 21, 2018 20:30 | June 22, 2018 13:00 | 16h 30m | 3,213 | 4,329 |
| 7 | November 7, 2018 17:15 | November 9, 2018 04:15 | 1d 11h | 3,135 | 9,097 |
| 8 | June 6, 2018 13:45 | June 7, 2018 06:15 | 16h 30m | 2,698 | 9,328 |
| 9 | December 21, 2018 05:45 | December 22, 2018 01:45 | 20h | 2,469 | 7,142 |
| 10 | October 31, 2018 15:45 | November 1, 2018 11:00 | 19h 15m | 1,357 | 7,057 |
Outage episodes by size in 2018: 63 reached 100+ customers, 12 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 2018, 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. | 2018 | 5.0 hrs | 1.18 | 2.1 hrs | 1.08 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 91% of California's customers in 2018; 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, 2018, 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/2018/california/napa-county