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Data & Trackers

About

Our data and interactives team creates graphics, databases, maps and other tools to tell compelling stories about the issues impacting California and the people who live here.

Editor's Picks
GitHub logo View: Our GitHub repositories
Wildfire dashboard thumbnail Map: Active wildfires across California
Water dashboard thumbnail Track: Water and drought conditions

INSIDE THE NEWSROOM

CalMatters: Holding the state accountable for 10 years, and we’re just getting started

In our first decade, CalMatters journalism has brought communities together, inspired lawmakers to create a better California and made the state more accountable to Californians.

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Meet the Team
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John Osborn D'Agostino
Data and Interactives Editor
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Mohamed Al Elew
Journalism Engineer
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Tomas Apodaca
Journalism Engineer
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Jeremia Kimelman
Data Reporter
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Natasha Uzcátegui-Liggett
Statistical Journalist
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Erica Yee
Data Reporter
Soo Oh
Soo Oh
Deputy Managing Editor
Two giant doors with oval glass windows illuminate the silhouettes of people standing around and talking to each other at the state Capitol in Sacramento.
Data & Trackers
Special interests poured more than half a billion into California lobbying last year
Google, oil companies and utilities helped push California lobbying to a record $540 million in 2024, up 10% from the year before.
By Jeremia Kimelman • April 21, 2025
Photo illustration of a graduation cap, surrounded by angular vignettes of an Asian woman in scrubs on an Ipad, a closeup of a hand cutting hair, a man using a circular saw, a Black woman on the computer, a man pointing to a computer screen while talking to a woman, a Black woman driving a truck; the background shows a grid with some cells filled with a triangular caution sign and some filled with a checkmark
Data & Trackers
Is your California career college or training program legit? Check its license or violations
Use CalMatters’ lookup tool to see if a career college or training program is licensed or has faced disciplinary actions.
By Ross Teixeira, Erica Yee and Adam Echelman • April 4, 2025
Photo illustration of a split composition; one side shows Attorney General Rob Bonta, set against a background of the CA flag and Attorney General seal; the other side shows Donald Trump behind a stack of papers, set against a background of an oil refinery; the middle of the composition features the scales of justice
Politics
Resistance state: Tracking California’s lawsuits against the new Trump administration
California is suing the new Trump administration to protect birthright citizenship, stop the mass firing of federal workers and sustain funding for health and science research.
By Mikhail Zinshteyn • January 21, 2025
Photo illustration of a steel border fence along chaparral; behind that fence there are multiple silhouettes of people’s side profiles intertwined with barbed wire
Politics
We asked all 58 California sheriffs about immigration enforcement under Trump. Here’s what they said
Look up how your sheriff responded to questions about their plans to cooperate with federal immigration enforcement.
By Tomas Apodaca and Nigel Duara • January 20, 2025
Firefighters in bright yellow jackets sprays water onto smoldering debris at the site of a fire. Thick smoke rises into the air, partially obscuring the charred remains of a building’s framework in the background. The scene is surrounded by rubble and burned structures.
California Wildfires
Map: How big are the LA fires? Use this tool to overlay them atop where you live
The fires sweeping across Los Angeles County for the past week have burned more than 50,000 acres, an area roughly equivalent to 2,200 Alcatraz Islands or 500 Disneylands, or larger than Washington, D.C. An arid fall and winter has dried out vegetation after two wetter-than-average years, providing fuel as a windstorm, with hurricane-force gusts topping […]
By Jeremia Kimelman and John Osborn D'Agostino • January 13, 2025
A person with pants, but no shirt, fills their water bottle during a hot day at a water station at a tennis court.
Climate Change
More extreme heat + more people = danger in these California cities. ‘Will it get as hot as Death Valley?’
Inland communities with big population booms will experience the most extreme heat days under climate change projections. The combination puts more people at risk — and many cities are unprepared.
By Alejandra Reyes-Velarde and Arfa Momin • September 5, 2024
Firefighters work as Park Fire burns near Chico on July 25, 2024. Photo by Fred Greaves, REUTERS
California Wildfires
Map: How big is the Park Fire? Use this tool to overlay it atop where you live
The Park Fire just pushed California’s wildfire season into overdrive. It has grown rapidly since it started near Chico on July 24. Within two days, the blaze had consumed some 178,000 acres, then it doubled the next day. By Sunday, the fire had devoured more acres than all of this year’s other fires to date […]
By Jeremia Kimelman and John Osborn D'Agostino • July 29, 2024
San Diego’s Lake Hodges Dam under repair in fall of 2022. The dam is expected to be replaced in the next decade. The dam, built as a multiple arch design, was completed in 1918, and purchased by the City of San Diego in 1925. Photo courtesy of John Gastaldo
Water
These 42 California dams need repairs. But lawmakers cut the funds in half
The dam repairs would store more water and protect the public, but legislators and the governor, facing a huge deficit, cut $50 million.
By Rachel Becker • June 13, 2024
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