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Report

California’s Water: Preparing for Floods

By Ellen Hanak, Jay Lund, Jeffrey Mount, Matt Kondolf ...

One in five residents and billions of dollars in assets are vulnerable to flooding. Climate change brings new vulnerabilities. This brief describes new tools and approaches that can reduce these risks.

Fact Sheet

Floods in California

By Jeffrey Mount, Gokce Sencan, Letitia Grenier

More than seven million Californians—one in five residents—live in areas at risk of flooding, and risks are growing. Improved land use planning, insurance, and innovative flood management can help.

Fact Sheet

Water Use in California

By Jeffrey Mount, Ellen Hanak, Caitlin Peterson

To understand California’s water, start here. Water use in California varies dramatically between wet and dry years: learn who’s using California’s water, where, and how much.

Policy Brief

Policy Brief: Tracking Where Water Goes in a Changing Sacramento–San Joaquin Delta

By Greg Gartrell, Jeffrey Mount, Ellen Hanak

The Sacramento–San Joaquin Delta supplies water to roughly 30 million Californians, over 6 million acres of farmland, and countless ecosystems. But the watershed’s climate is changing: recent decades have seen record warmth, higher evaporation, and declining snowpack. We track where the water is going—and how to adapt.

Report

Improving the Federal Response to Western Drought: Five Areas for Reform

By Ellen Hanak, Jay Lund, Jeffrey Mount, Peter Moyle ...

Coping with drought is a major challenge for the American West. The federal government is deeply involved in western water. The latest widespread drought has revealed both strengths and weaknesses in the federal role. This report proposes five pragmatic, near-term reforms that would enhance existing federal capacities and help western states better manage drought.

Read a summary of the report’s policy recommendations.

This research was supported with funding from The William and Flora Hewlett Foundation.

Report

Advancing Ecosystem Restoration with Smarter Permitting

By Letitia Grenier, Stephanie Panlasigui, Crissy Pickett, Gokce Sencan

California’s ecosystems are vital to the state’s economy and wellbeing, yet they’re in dire health. Large-scale restoration is needed, and implementing smarter permitting can help.

Report

California’s Water: Water for the Environment

By Ellen Hanak, Jay Lund, Jeffrey Mount, Peter Moyle ...

River and wetland ecosystems in California—and the many birds, fish, and other species they support—are in serious decline. Major investments and novel approaches are needed to improve the health of our natural environment. This brief explains how water is used for environmental purposes and describes priority approaches that could improve its management.

Report

Managing Wastewater in a Changing Climate

By Caitrin Chappelle, Henry McCann, David Jassby, Kurt Schwabe

California’s wastewater sector helps protect public health and the environment. It is also the source of recycled water. But climate change is bringing water scarcity and other pressures to the sector. Shifts in policy and planning can help prepare the sector for a more volatile future.

Statewide Survey

PPIC Statewide Survey: Californians and the Environment

By Mark Baldassare, Dean Bonner, Rachel Lawler, Deja Thomas

Key findings from the current survey include: One in four Californians name water supply and drought as the state’s top environmental issue; 63% say water supply is a big problem in their region. Majorities approve of the way Governor Newsom and President Biden are handling environmental issues. About six in ten (63%) are very concerned about climate change increasing the severity of wildfires and drought. Majorities across party lines favor prioritizing alternative energy sources, such as wind, solar, and hydrogen.

Report

California’s Water: Energy and Water

By Ellen Hanak, Jay Lund, Katrina Jessoe, Robert Wilkinson ...

Energy and water use in the state are interconnected yet managed separately. This brief describes the synergies and tradeoffs between the two sectors and proposes ways to increase the efficiency and sustainability of both.

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