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Water Basics
Agriculture
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.
Conservation Tips
Water conservation is part of the California lifestyle.
The Delta
The Sacramento-San Joaquin Delta is the heart of California’s water system.
Drought
Drought is a reoccurring feature of California’s climate.
Environment
California's unique geography and climate foster a diverse ecosystem that relies on water.
Flood
California is prone to periodic, and sometimes severe, floods.
Groundwater
The water stored beneath our feet is an important water supply source in California.
Glossary
Find definitions of key terms and concepts related to our work.
What We Do
Dam Safety
We provide oversight to the design, construction, and maintenance of over 1,200 dams in California.
Education
We provide resources for teachers and other Californians to learn about the complex world of water.
Emergency Management
We protect life and property from catastrophic events such as flood, drought, and infrastructure fai ...
Flood Preparedness
We work with communities and emergency responders to prepare for flood season.
Infrastructure
We construct, maintain and ensure the safety of a many water infrastructure facilities.
Power
The SWP is the fourth largest producer of energy in the state.
Recreation
The SWP provides extensive recreational activities at and around its reservoirs.
Science
Science is integral to our policy and management decisions.
Sustainability
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.
Programs
All Programs
Learn more about our other programs and projects that help sustainably manage California’s water res ...
Bay Delta
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 ...
Environmental Services
We conduct scientific and environmental analysis to help protect and restore the environment.
Flood Management
Our work in statewide flood forecasting and flood operations help reduce flood risk.
Groundwater Management
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.
Climate Change
Managing climate change and its impact of water supply is one of DWR’s core values.
Work with Us
Careers
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.
Real Estate
We acquire temporary and permanent land rights to support our mission.
Procurement
We contract for goods and services through our procurement process.
Technical Assistance
We provide technical guidance, assistance, and resources through 4 regional offices.
Tribal Policy
We are committed to open, inclusive, and regular communication with tribal governments, communities.
News
Current Conditions
We provide real-time hydrologic information, including reservoir and river conditions.
DWR Updates
Find feature stories, program updates, videos, and more.
Events
View upcoming and past DWR events
News Releases
View our news releases for the latest information on our work and projects.
Public Notices
Find notices on public hearings, intent to award contracts and grants, and purchases.
Library
Documents
View DWR reports and publications in our document library.
Educational Materials
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 ...
Photos
Pixel – our web-based photo gallery – features free downloadable images of California’s natural reso ...
Public Forms
We provide an access point to DWR Public forms. The Directory contains links to electronic versions ...
Videos
View our YouTube channel for videos featuring our projects, facilities, and latest news.
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Showing 40 of 2575 results found for "Hydrologic Region Groundwater Level Change Pie Map - Spring"
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PDF File
Mountain Counties Region Map (Tabloid)
| (Published Date: May 19, 2020)
PDF File
Sacramento River Region Map (Letter)
| (Published Date: May 19, 2020)
PDF File
Fall-2017-Groundwater-Level-Data-Summary_ay_19
| (Published Date: October 21, 2019)
PDF File
Southern Region Office Map
| (Published Date: March 8, 2023)
PDF File
South Central Region Office Map
| (Published Date: March 8, 2023)
PDF File
North Central Region Office Map
| (Published Date: March 8, 2023)
Zip File
Bulletin 118 Groundwater Basin Boundary GIS Data - v6_2
| (Published Date: January 5, 2022)
Word File
Appendix F2 Climate Change Attachments 1-2
| (Published Date: April 6, 2020)
Word File
Higher Standard: Flood Hazard Studies-Maps in Addition to FIS/FIRM
| (Published Date: April 2, 2021)
PDF File
SJRegion_Image
| (Published Date: May 24, 2021)
PDF File
Groundwater Management Plan Self-Certification Form
| (Published Date: November 22, 2019)
PDF File
2022 Integrated Regional Water Management Grant Program Guidelines
| (Published Date: May 17, 2022)
PDF File
Climate Change Factsheet_120222ADAApproved
| (Published Date: January 31, 2023)
PDF File
Oroville Closure Area Map June 28, 2019
| (Published Date: June 28, 2019)
PDF File
Oroville Level 2 Risk Analysis Public Summary
| (Published Date: February 19, 2021)
PDF File
Data Management Strategy for the Spring-Run Chinook Salmon Juvenile Production Estimate
| (Published Date: September 30, 2022)
PDF File
ITP Spring-run Chinook Salmon Juvenile Production Estimate - Core Team Decision Charter 2022-07
| (Published Date: March 14, 2023)
PDF File
ITP Spring-run Chinook Salmon JPE Science Plan
| (Published Date: April 6, 2022)
PDF File
Appendix F Climate Change
| (Published Date: April 6, 2020)
PDF File
Spring Head of Old River
| (Published Date: February 2, 2022)
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