Power Out Map
– 0% of Mariposa out 0 customers out in California

Power outage history

Mariposa County California

65hours

without power for the average customer in a typical year, 2018–2025

4th most of 56 in California 9.8× the national median

Worst outage on record Feb 25, 2023 100% of customers out · 90% back in 3.2 days
Hours without power, average customer per year 65h / yr State average 6.2 h · national median 6.6 h
Major outages a year 16.1 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 4hours Median across major outages, from the peak
Longest single outage 13.7days Jan 19, 2021, over 1% of customers out
Outage hours on storm days 30% Share falling on days with a NOAA storm report here
Worst year 2021 5.7 days without power, average customer
Electricity customers 7,262 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Mariposa's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2021 was the worst well-recorded year, at 5.7 days for the average customer. Hatched years have a thin record and are left out of the averages.

Mariposa, hours without power per customer

MariposaUS median countyCalifornia average
0 50 100 150 200 31 ’18 61 ’19 28 ’20 136 ’21 83 ’22 110 ’23 34 ’24 33 ’25 US 6.6 CA 6.2

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Feb 24, 2023 Winter storm 7,262 100% 12.2 d 3.2 d 603k
Jan 19, 2021 No storm report 7,262 100% 13.7 d 5.5 d 592k
Jul 21, 2022 No storm report 3,294 45% 12.7 d 9.9 d 428k
Oct 27, 2019 No storm report 3,679 51% 2.6 d 37 h 149k
Dec 27, 2021 Winter storm 3,977 55% 2.3 d 2.2 d 89k
Jul 4, 2024 Heat 4,100 56% 25 h 23 h 82k
Feb 4, 2019 No storm report 3,944 54% 3.1 d 2.3 d 66k
Jul 25, 2018 No storm report 2,303 32% 3.3 d 2.9 d 65k
Oct 4, 2020 No storm report 7,262 100% 9.0 h 8.8 h 65k
Aug 7, 2021 No storm report 2,643 36% 21 h 22 h 46k
Aug 3, 2018 No storm report 1,025 14% 5.1 d 3.3 d 45k
Dec 14, 2024 Windstorm 3,994 55% 37 h 28 h 38k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +22h 90% by +56h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Mariposa from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 70%
  • Winter storm 23%
  • Heat 4.7%
  • Windstorm 1.3%
  • Flooding 0.5%

Who keeps the lights on

Utilities serving Mariposa

As each utility reports to the Energy Information Administration for its whole California territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Pacific Gas & Electric Co. Investor Owned 273 208 1.63 37.5 5.1M

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across California

Where it is darkest

Hours / yr64+

All California counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 7,262 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →