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California is an agricultural leader, and it depends on irrigation.
The California Water System
Our water system is a complex relationship between nature and manmade structures that move water.
Climate Change Basics
Climate change can have a profound impact on California’s water resources.
Water conservation is part of the California lifestyle.
The Sacramento-San Joaquin Delta is the heart of California’s water system.
Drought is a reoccurring feature of California’s climate.
California's unique geography and climate foster a diverse ecosystem that relies on water.
California is prone to periodic, and sometimes severe, floods.
The water stored beneath our feet is an important water supply source in California.
Find definitions of key terms and concepts related to our work.
What We Do
We provide oversight to the design, construction, and maintenance of over 1,200 dams in California.
California must do all it can to prepare for the recurring impacts of drought.
We educate students and communities throughout California on water issues and water safety.
We protect life and property from catastrophic events such as flood, drought, and infrastructure fai ...
We work with communities and emergency responders to prepare for flood season.
We construct, maintain and ensure the safety of a many water infrastructure facilities.
The SWP is the fourth largest producer of energy in the state.
The SWP provides extensive recreational activities at and around its reservoirs.
Science is integral to our policy and management decisions.
Our work aims to protect natural ecosystems’ abilities to meet the needs of future generations.
Water Storage & Supply
We operate and maintain the State Water Project and support sustainable groundwater management.
Learn more about our other programs and projects that help sustainably manage California’s water res ...
Our work in the Sacramento-San Joaquin Delta aims to improve ecosystems and water quality, supply, r ...
California Water Plan
We provide a collaborative planning framework to make informed decisions for our water future.
Division of Safety Dams
DSOD regulates more than 1200 dams to prevent failure, safeguard life, and protect property.
Engineering & Construction
We provide engineering, geology, real estate, and geodetic services for an array of water infrastruc ...
We conduct scientific and environmental analysis to help protect and restore the environment.
Our work in statewide flood forecasting and flood operations help reduce flood risk.
We support the sustainable management of California’s underground water reserves.
Integrated Regional Water Management
We work with regional water managers to implement solutions that increase regional self-reliance.
State Water Project
This water storage and delivery system provides water to almost 27 million Californians and 750,000 ...
Water Use & Efficiency
We assist agencies and individuals with agricultural and urban water conservation.
Work with Us
Join us for a rewarding career ensuring the sustainability of California's water resources.
Grants & Loans
We offer a number of grant and loan programs that support integrated water management activities.
We acquire temporary and permanent land rights to support our mission.
We contract for goods and services through our procurement process.
We provide technical guidance, assistance, and resources through 4 regional offices.
We provide real-time hydrologic information, including reservoir and river conditions.
Find feature stories, program updates, videos, and more.
View upcoming and past DWR events
View our news releases for the latest information on our work and projects.
Find notices on public hearings, intent to award contracts and grants, and purchases.
View DWR reports and publications in our document library.
We provide educational publications to view, download, and order.
Modeling & Analysis
We develop and maintain a number of state-of-the-art models and analytical tools.
Other DWR Portals
DWR maintains several additional web portals containing data and maps. These portals remains unchang ...
Pixel – our web-based photo gallery – features free downloadable images of California’s natural reso ...
We provide an access point to DWR Public forms. The Directory contains links to electronic versions ...
View our YouTube channel for videos featuring our projects, facilities, and latest news.
What We Do
Tree-Ring Study Data Files
Tree-Ring Study Data Files
Register to vote
Save Our Water
Water Education Materials
Conditions of Use
Office of Governor
Edmund G. Brown Jr.
Visit Governor Website
Natural Resources Agency
Visit Natural Resources Website
Department of Water Resources
Visit Director Profile Page