County annual report · FIPS 06013
2020 Contra Costa County, CA Power Outage Report
In 2020, customers in Contra Costa County, CA went without power for an average of 3.7 hours, a total of 1.8M customer-hours (California average 6.3 hours). That ranks 46th worst of 57 California counties and 1684th of 3,019 nationally.
Compared with CA, the US and 2019
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Contra Costa County, 2020
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 26, 2020 03:15 | October 30, 2020 01:30 | 3d 22h | 18,389 | 592K |
| 2 | August 13, 2020 22:00 | August 21, 2020 10:15 | 7d 12h | 17,450 | 196K |
| 3 | February 5, 2020 13:30 | February 12, 2020 10:45 | 6d 21h | 17,126 | 86K |
| 4 | May 11, 2020 15:45 | May 12, 2020 13:00 | 21h 15m | 14,137 | 12K |
| 5 | February 26, 2020 16:15 | February 28, 2020 11:30 | 1d 19h | 8,141 | 10K |
| 6 | November 13, 2020 17:15 | November 14, 2020 19:15 | 1d 2h | 6,926 | 33K |
| 7 | March 17, 2020 00:15 | March 17, 2020 08:15 | 8h | 6,754 | 15K |
| 8 | May 25, 2020 18:00 | May 28, 2020 10:45 | 2d 16h | 6,082 | 35K |
| 9 | April 24, 2020 17:00 | April 25, 2020 02:15 | 9h 15m | 5,515 | 4,955 |
| 10 | September 13, 2020 23:15 | September 15, 2020 08:30 | 1d 9h | 5,395 | 4,902 |
Outage episodes by size in 2020: 282 reached 100+ customers, 84 reached 1,000+ customers, 4 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 Contra Costa County reported on EIA Form 861 for 2020, 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. | 2020 | 7.4 hrs | 1.34 | 2.3 hrs | 1.04 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of California's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 486,945 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. Contra Costa County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Contra Costa County, CA annual power outage report, 2020, 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/2020/california/contra-costa-county