County annual report · FIPS 06077
2023 San Joaquin County, CA Power Outage Report
In 2023, customers in San Joaquin County, CA went without power for an average of 9.6 hours, a total of 3.1M customer-hours (California average 7.9 hours). That ranks 32nd worst of 57 California counties and 878th 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 San Joaquin 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 | January 1, 2023 00:00 | January 7, 2023 08:00 | 6d 8h | 43,541 | 1.4M |
| 2 | January 7, 2023 15:00 | January 25, 2023 10:45 | 17d 19h | 40,830 | 956K |
| 3 | July 25, 2023 12:15 | July 26, 2023 10:15 | 22h | 17,816 | 38K |
| 4 | June 29, 2023 15:00 | July 4, 2023 09:30 | 4d 18h | 6,792 | 57K |
| 5 | November 8, 2023 15:45 | November 9, 2023 08:30 | 16h 45m | 6,604 | 7,689 |
| 6 | July 7, 2023 15:15 | July 9, 2023 07:45 | 1d 16h | 5,725 | 19K |
| 7 | March 12, 2023 15:45 | March 15, 2023 10:30 | 2d 18h | 5,478 | 31K |
| 8 | September 7, 2023 15:15 | September 8, 2023 11:15 | 20h | 5,106 | 2,219 |
| 9 | April 27, 2023 13:15 | May 4, 2023 12:45 | 6d 23h | 4,957 | 33K |
| 10 | September 25, 2023 06:45 | September 26, 2023 04:45 | 22h | 4,744 | 13K |
Outage episodes by size in 2023: 162 reached 100+ customers, 61 reached 1,000+ customers, 3 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 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 |
| Modesto Irrigation District | 2023 | 60 min | 0.60 | 39 min | 0.47 |
| City of Lodi - (CA) | 2023 | 35 min | 0.17 | 20 min | 0.13 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| 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 n/a of California's customers in 2023; 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, 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/san-joaquin-county