County annual report · FIPS 06043
2025 Mariposa County, CA Power Outage Report
In 2025, customers in Mariposa County, CA went without power for an average of 32.7 hours, a total of 238K customer-hours (California average 7.6 hours). That ranks 6th worst of 57 California counties and 165th of 3,000 nationally.
Compared with CA, the US and 2024
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Mariposa County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 19, 2025 05:45 | September 19, 2025 12:00 | 6h 15m | 3,844 | 21K |
| 2 | March 13, 2025 06:45 | March 15, 2025 21:00 | 2d 14h | 3,484 | 22K |
| 3 | August 27, 2025 06:15 | August 27, 2025 07:00 | 45m | 3,078 | 1,676 |
| 4 | August 4, 2025 11:00 | August 4, 2025 23:30 | 12h 30m | 3,075 | 12K |
| 5 | July 20, 2025 18:45 | July 21, 2025 03:45 | 9h | 3,037 | 14K |
| 6 | August 11, 2025 00:15 | August 11, 2025 23:30 | 23h 15m | 3,030 | 20K |
| 7 | August 16, 2025 15:15 | August 16, 2025 22:15 | 7h | 2,718 | 3,435 |
| 8 | September 6, 2025 12:00 | September 6, 2025 20:30 | 8h 30m | 2,448 | 5,216 |
| 9 | March 13, 2025 02:15 | March 13, 2025 03:00 | 45m | 2,136 | 1,602 |
| 10 | June 16, 2025 14:15 | June 16, 2025 23:45 | 9h 30m | 1,941 | 1,989 |
Outage episodes by size in 2025: 63 reached 100+ customers, 12 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 Mariposa County reported on EIA Form 861 for 2025, 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 |
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 2025; 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, 2025, 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/2025/california/mariposa-county