County annual report · FIPS 06077
2020 San Joaquin County, CA Power Outage Report
In 2020, customers in San Joaquin County, CA went without power for an average of 2.1 hours, a total of 696K customer-hours (California average 6.3 hours). That ranks 53rd worst of 57 California counties and 2192nd 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 San Joaquin 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 | August 12, 2020 14:30 | August 22, 2020 18:45 | 10d 4h | 67,403 | 165K |
| 2 | August 11, 2020 07:30 | August 12, 2020 01:45 | 18h 15m | 6,429 | 14K |
| 3 | January 28, 2020 16:30 | January 29, 2020 12:15 | 19h 45m | 5,434 | 4,798 |
| 4 | May 24, 2020 06:30 | May 26, 2020 07:30 | 2d 1h | 4,559 | 37K |
| 5 | October 24, 2020 16:30 | October 25, 2020 09:30 | 17h | 4,449 | 3,484 |
| 6 | September 21, 2020 14:30 | September 22, 2020 14:00 | 23h 30m | 4,386 | 3,978 |
| 7 | August 3, 2020 00:30 | August 4, 2020 22:45 | 1d 22h | 4,328 | 3,650 |
| 8 | January 16, 2020 16:45 | January 17, 2020 09:00 | 16h 15m | 4,321 | 9,847 |
| 9 | December 12, 2020 10:00 | December 12, 2020 15:30 | 5h 30m | 4,281 | 6,595 |
| 10 | November 5, 2020 15:00 | November 6, 2020 08:30 | 17h 30m | 4,157 | 2,916 |
Outage episodes by size in 2020: 233 reached 100+ customers, 70 reached 1,000+ customers, 1 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 San Joaquin 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 |
| Modesto Irrigation District | 2020 | 52 min | 0.63 | 44 min | 0.58 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| City of Lodi - (CA) | - | - | - | - | - |
| Lathrop Irrigation District | - | - | - | - | - |
| Port of Stockton - (CA) | - | - | - | - | - |
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 ÷ 324,543 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. San Joaquin County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), San Joaquin 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/san-joaquin-county