County annual report · FIPS 06109
2017 Tuolumne County, CA Power Outage Report
In 2017, customers in Tuolumne County, CA went without power for an average of 0.0 hours, a total of 80 customer-hours (California average 2.2 hours). That ranks 24th worst of 47 California counties and 2717th of 2,786 nationally.
Compared with CA, the US and 2016
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Tuolumne County, 2017
The 2 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 11, 2017 17:00 | September 11, 2017 19:30 | 2h 30m | 29 | 73 |
| 2 | December 12, 2017 16:30 | December 12, 2017 16:45 | 15m | 29 | 7 |
Outage episodes by size in 2017: 0 reached 100+ customers, 0 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 2017, 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. | 2017 | 6.2 hrs | 1.55 | 1.9 hrs | 0.96 |
| Southern California Edison Co | 2017 | 2.3 hrs | 1.19 | 1.5 hrs | 0.87 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Turlock Irrigation District | - | - | - | - | - |
| 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 2017; 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, 2017, 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/2017/california/tuolumne-county