County annual report · FIPS 06109
2024 Tuolumne County, CA Power Outage Report
In 2024, customers in Tuolumne County, CA went without power for an average of 27.7 hours, a total of 653K customer-hours (California average 6.1 hours). That ranks 9th worst of 57 California counties and 351st of 2,990 nationally.
Compared with CA, the US and 2023
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Tuolumne County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 14, 2024 11:30 | December 16, 2024 05:15 | 1d 17h | 9,582 | 76K |
| 2 | September 27, 2024 02:15 | September 27, 2024 02:45 | 30m | 7,721 | 3,861 |
| 3 | April 4, 2024 21:00 | April 7, 2024 21:30 | 3d | 5,253 | 85K |
| 4 | July 17, 2024 12:15 | July 17, 2024 22:30 | 10h 15m | 4,566 | 14K |
| 5 | February 4, 2024 16:45 | February 7, 2024 02:45 | 2d 10h | 4,067 | 29K |
| 6 | October 25, 2024 13:30 | October 26, 2024 03:00 | 13h 30m | 4,008 | 11K |
| 7 | January 11, 2024 05:00 | January 12, 2024 02:00 | 21h | 3,805 | 12K |
| 8 | October 16, 2024 15:30 | October 17, 2024 01:15 | 9h 45m | 3,741 | 2,841 |
| 9 | October 29, 2024 16:00 | October 30, 2024 04:15 | 12h 15m | 3,652 | 3,921 |
| 10 | July 6, 2024 11:15 | July 8, 2024 07:30 | 1d 20h | 3,546 | 12K |
Outage episodes by size in 2024: 120 reached 100+ customers, 51 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 Tuolumne County reported on EIA Form 861 for 2024, 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. | 2024 | 8.5 hrs | 2.15 | 4.6 hrs | 1.82 |
| Southern California Edison Co | 2024 | 2.6 hrs | 0.99 | 1.7 hrs | 0.90 |
| Turlock Irrigation District | 2024 | 74 min | 0.79 | 49 min | 0.52 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Tuolumne County Pub Power Agny | - | - | - | - | - |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 23,610 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. Tuolumne County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Tuolumne County, CA annual power outage report, 2024, 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/2024/california/tuolumne-county