County annual report · FIPS 06043
2021 Mariposa County, CA Power Outage Report
In 2021, customers in Mariposa County, CA went without power for an average of 137.9 hours, a total of 1.0M customer-hours (California average 6.6 hours). That ranks 3rd worst of 57 California counties and 46th 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 Mariposa 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 | November 3, 2021 14:45 | November 4, 2021 00:00 | 9h 15m | 10,893 | 16K |
| 2 | March 10, 2021 12:00 | March 11, 2021 04:00 | 16h | 10,290 | 27K |
| 3 | January 19, 2021 07:00 | February 3, 2021 04:00 | 14d 21h | 8,210 | 597K |
| 4 | December 27, 2021 01:15 | December 31, 2021 00:15 | 3d 23h | 3,977 | 90K |
| 5 | May 13, 2021 16:15 | May 13, 2021 22:00 | 5h 45m | 3,821 | 2,710 |
| 6 | October 19, 2021 14:45 | October 20, 2021 10:45 | 20h | 3,807 | 4,231 |
| 7 | October 24, 2021 16:00 | October 26, 2021 02:15 | 1d 10h | 3,293 | 26K |
| 8 | August 26, 2021 14:15 | August 26, 2021 23:30 | 9h 15m | 3,199 | 20K |
| 9 | August 23, 2021 12:30 | August 23, 2021 22:45 | 10h 15m | 2,923 | 25K |
| 10 | September 9, 2021 15:30 | September 10, 2021 01:45 | 10h 15m | 2,916 | 15K |
Outage episodes by size in 2021: 57 reached 100+ customers, 18 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 Mariposa 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 |
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 ÷ 7,262 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. Mariposa County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Mariposa 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/mariposa-county