County annual report · FIPS 06057
2021 Nevada County, CA Power Outage Report
In 2021, customers in Nevada County, CA went without power for an average of 55.7 hours, a total of 2.9M customer-hours (California average 6.6 hours). That ranks 9th worst of 57 California counties and 156th of 2,974 nationally.
Compared with CA, the US and 2020
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Nevada County, 2021
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 24, 2021 06:45 | December 31, 2021 00:15 | 6d 17h | 32,091 | 2.1M |
| 2 | May 7, 2021 05:15 | May 7, 2021 06:45 | 1h 30m | 13,513 | 3,383 |
| 3 | December 13, 2021 04:45 | December 20, 2021 07:00 | 7d 2h | 9,207 | 207K |
| 4 | October 24, 2021 13:00 | October 28, 2021 07:15 | 3d 18h | 6,371 | 143K |
| 5 | January 27, 2021 02:15 | February 1, 2021 02:15 | 5d | 4,506 | 58K |
| 6 | July 22, 2021 14:30 | July 23, 2021 10:45 | 20h 15m | 4,419 | 19K |
| 7 | August 6, 2021 01:30 | August 12, 2021 23:45 | 6d 22h | 3,390 | 61K |
| 8 | February 25, 2021 06:45 | February 26, 2021 01:30 | 18h 45m | 3,380 | 4,267 |
| 9 | October 9, 2021 14:15 | October 10, 2021 05:00 | 14h 45m | 3,246 | 7,221 |
| 10 | March 10, 2021 09:30 | March 12, 2021 03:45 | 1d 18h | 3,080 | 22K |
Outage episodes by size in 2021: 117 reached 100+ customers, 37 reached 1,000+ customers, 2 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 Nevada County reported on EIA Form 861 for 2021, 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. | 2021 | 10.4 hrs | 1.84 | 3.6 hrs | 1.32 |
| Liberty Utilities | 2021 | 16.8 hrs | 4.60 | 11.7 hrs | 3.86 |
| Truckee Donner P U D | 2018 | 5.0 hrs | 0.88 | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of California's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 52,251 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. Nevada County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Nevada County, CA annual power outage report, 2021, 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/2021/california/nevada-county