Donate
PPIC Logo Independent, objective, nonpartisan research

Search Results

Filters Sort by:
Report

Driving Change: Reducing Vehicle Miles Traveled in California

By Ellen Hanak, Louise Bedsworth, Jed Kolko

Can Californians cut down on their driving? Encouraging job growth near transit stations will help. So will pursuing policies that raise the cost of driving. This report examines California’s progress in these and other areas, finding both opportunities and challenges ahead.

This research was supported with funding from The William and Flora Hewlett Foundation, as part of the California 2025 project on the state's future, and the David A. Coulter Family Foundation.

Policy Brief

Policy Brief: Improving California’s Water Market

By Andrew Ayres, Ellen Hanak, Brian Gray, Gokce Sencan ...

This policy brief distills key takeaways from our report on water trading and banking in California, and how they will help the state bring its groundwater basins into balance under the Sustainable Groundwater Management Act (SGMA). A broad range of policy changes could improve and expand California’s water market while protecting communities from harm.

Report

Stress Relief: Prescriptions for a Healthier Delta Ecosystem

By Ellen Hanak, Jay Lund, William Fleenor, Jeffrey Mount ...

California is at a critical juncture on policy for the Sacramento–San Joaquin Delta. This report summarizes the results of a wide-ranging study of cost-effective ways to improve the health of the Delta ecosystem. It highlights the need for science-based, integrated management of the many sources of ecosystem stress. The report also recommends improvements to the highly fragmented system of oversight that now involves dozens of federal, state, and local agencies. This research was supported with funding from the S. D. Bechtel, Jr. Foundation.

Several companion reports contain related findings:

Aquatic Ecosystem Stressors in the Sacramento–San Joaquin Delta (Mount et al. 2012) summarizes the science of Delta ecosystem stressors for a policymaking audience.

Costs of Ecosystem Management Actions for the Sacramento–San Joaquin Delta (Medellín-Azuara et al. 2013) assesses costs of water management actions.

Integrated Management of Delta Stressors: Institutional and Legal Options (Gray et al. 2013) lays out proposals for institutional reform of science, management, and regulation.

Scientist and Stakeholder Views on the Delta Ecosystem (Hanak et al. 2013) presents detailed results of the two surveys conducted by the report’s authors.

Where the Wild Things Aren’t: Making the Delta a Better Place for Native Species (Moyle et al. 2012) outlines a realistic long-term vision for achieving a healthier ecosystem.

Fact Sheet

Groundwater Recharge in California

By Alvar Escriva-Bou, Gokce Sencan, Ellen Hanak

Groundwater recharge can replenish overdrafted basins, and help California adapt to greater climate extremes.

Report

Priorities for California’s Water

By Jeffrey Mount, Letitia Grenier, Ellen Hanak, Caitlin Peterson ...

California has made great strides in preparing for a drier, hotter future, but it remains a challenge to harness the bounty of wet years while also reducing flood risk. How did California’s water sector manage the unusually wet 2023 water year—and what lessons can we glean for the future?

Statewide Survey

PPIC Statewide Survey: Californians and the Environment

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

Key findings include: Three in ten Californians name water supply and drought as the state’s top environmental issue; nearly seven in ten say the water supply is a big problem in their part of the state. More than half of Californians say higher gas prices have caused financial hardship, and more than four in ten are upset about the current rate of inflation. Most Californians oppose offshore drilling, and an overwhelming majority want to prioritize alternative energy over oil, coal, and natural gas. But views are divided along party lines. Democrats are much more likely than independents and Republicans to support key state climate change policies.

Report

California’s Water: Water for Cities

By Ellen Hanak, Jay Lund, David Mitchell, Newsha Ajami ...

California’s urban water suppliers are adapting to an increasing population and a growing economy by diversifying supplies and reducing demand. Ongoing challenges described in this brief include managing water quality and developing cost-effective, sustainable local supplies.

Report

Comparing Futures for the Sacramento-San Joaquin Delta

By Ellen Hanak, Jay Lund, William Fleenor, Jeffrey Mount ...

For over 50 years, California has been pumping water through the Sacramento-San Joaquin Delta for extensive urban and agricultural uses around the state. Today, the Delta is ailing and in urgent need of a new management strategy. This report concludes that building a peripheral canal to carry water around the Delta is the most promising way to balance two critical policy goals: reviving a threatened ecosystem and ensuring a reliable, high-quality water supply for California.
 
More information can be found in the following supporting appendices:

Appendix A. Policy and Regulatory Challenges for the Delta of the Future

Appendix B. Levee Decisions and Sustainability for the Delta

Appendix C. Delta Hydrodynamics and Water Salinity with Future Conditions

Appendix D. The Future of the Delta Ecosystem and Its Fish

Appendix E. Expert Survey on the Viability of Delta Fish Populations

Appendix F. The Economic Costs and Adaptations for Alternative Delta Regulations

Appendix G. Peripheral Canal Design and Implementation Options

Appendix H. Delta Drinking Water Quality and Treatment Costs

Appendix I. The Economic Effects on Agriculture of Water Export Salinity South of the Delta

Appendix J. Decision Analysis of Delta Strategies
 
 
 

Report

California’s Water: Paying for Water

By Ellen Hanak, Dean Misczynski, Jay Lund, Brian Gray ...

Sustainable solutions by state and local leaders are needed to close serious funding gaps in a number of critical areas of water management—including floods, water quality, and aquatic ecosystems. This brief describes the state’s major water funding gaps and proposes ways to fill them.

Search results are limited to 100 items. Please use the Refine Results tool if you are not finding what you are looking for.