Sacramento River

The Sacramento River region includes the entire drainage of the Sacramento River and its tributaries, spanning from Chipps Island in Solano County northward to Goose Lake in Modoc County. The state’s two largest water systems, the Central Valley Project and the State Water Project, originate here. Agriculture is the main driver, with over 1.5 million acres irrigated on the valley floor. Top grossing crops include rice, walnuts, almonds, and tomatoes.

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Groundwater Quality in the Yuba River and Bear River Watersheds, Sierra Nevada, California

U.S. Geological Survey (USGS) | September 27th, 2017

Summary

The Yuba River and Bear River Watersheds study unit (Yuba-Bear Watersheds) covers approximately 4,400 square kilometers on the western slope of the Sierra Nevada. Groundw

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Groundwater Quality Protection Strategy for the Central Valley Region, a Roadmap - Addendum 2015/2016

Central Valley Regional Water Quality Control Board (CVRWQCB) | May 7th, 2017

Summary

The Groundwater Quality Protection Strategy for the Central Valley Region, a Roadmap (GWQ Strategy) was developed through active stakeholder outreach and approved by the

The Groundwater Quality Protection Strategy for the Central Valley Region, a Roadmap (GWQ Strategy) was developed through active stakeholder outreach and approved by the Central Valley Water Board (September 2010 Resolution R5-2010-0095.) The GWQ Strategy is intended to provide a long range planning document that defines the regulatory programs to be enhanced, and identify ways to expand on all partnering opportunities to protect groundwater quality. Within the GWQ Strategy, actions were identified to implement groundwater quality protection. In the five years since the GWQ Strategy was approved, work has been completed on some actions, progress has been made on others, and new or emerging issues have been identified. This Addendum to the GWQ Strategy is intended to provide an update on any sections where changes may have occurred such as: new regulations or policies, programs have been added or modified, and new or emerging issues have been identified. In this Addendum, only the sections and/or subsections have been updated where new information was available since the GWQ Strategy was approved. The sections that have had the most extensive changes are sections 3, 4, and 6. In the last five years, there have been many legislative actions, bond initiatives, and new statewide policies that warranted updates to subsection: 3.2. Section 4 describes the Groundwater Quality Protection Programs the Central Valley Water Board implements. The most extensive updates to this section was to describe changes in program implementation for subsections, 4.1.1 Confined Animal Facilities, 4.1.2 Irrigated Lands Regulatory Program, and the addition of a new Oil Field Program under section 4.1.7. Section 6 is the Roadmap that identifies actions to be taken to improve groundwater quality. Updates to this section modify the numbering system used to identify the actions and includes nine new actions that have been prioritized using criteria from the GWQ Strategy. Some of these actions are directly related to new regulations, on-going drought related issues, or continuation of work identified in the GWQ Strategy in 2010.

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Groundwater Quality Protection Strategy: A "Roadmap" for the Central Valley Region

Central Valley Regional Water Quality Control Board (CVRWQCB) | January 8th, 2010

Summary

The California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) recognizes that past regulatory approaches have not protected all

The California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) recognizes that past regulatory approaches have not protected all groundwater from historical and current practices associated with land applications of waste. For example, in some areas of the Central Valley Region groundwater produced from some aquifers that serve individual and community drinking water systems have been polluted and are unsafe to drink. In response, the Central Valley Water Board adopted Resolution R5-2008-0181 directing staff to develop a Groundwater Quality Protection Strategy (Roadmap) through an active stakeholder process. Developing a Roadmap for the Central Valley Region is not initiating a new regulatory program. This Roadmap is intended to be an overarching framework or an outline for long range planning. By presenting it to the Central Valley Water Board it allows the Board review and approval of the overarching plan as well as an opportunity to provide direction to staff. Further, it defines the regulatory programs to be enhanced, and identifies ways to expand on all partnering opportunities with other federal, state, and/or local agencies to protect groundwater quality. Following approval of the Roadmap, workplan(s) will be developed for the higher priority future actions to provide a more detailed description of tasks, timelines, and resources required to implement those actions. In order to make this Roadmap useful to the public, policy-makers, and the Central Valley Water Board, a starting point to map a course for the future had to be identified. The starting point for the Roadmap is the background (Section 3) information on agencies and organization, the Central Valley Region’s basins, and primary constituents of concern. Current Groundwater Quality Protection Programs (Section 4) being implemented by the Central Valley Water Board describe how groundwater quality is being protected now. To assist in the evaluation of existing groundwater quality protection programs and identification of future actions, Stakeholder’s Concerns and Issues (Section 5) were also considered. The final section of the Strategy is the “Roadmap” (Section 6) which focuses on future actions that can be implemented within the next five to twenty years. To illustrate the Roadmap, a description is provided of three basic elements: a) future actions; b) how the actions are prioritized; and c) resource needs to implement the actions. Implementation of future actions, are not limited to the Central Valley Water Board. Future actions may be implemented by: the Central Valley Water Board; other agencies or organization; or through a partnership between agencies.

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Groundwater Quality Protection Strategy: A “Roadmap” for the Central Valley Region

California Environmental Protection Agency (CalEPA) | August 2nd, 2010

Summary

The California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) recognizes that past regulatory approaches have not protected all

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Groundwater residence time estimates obscured by anthropogenic carbonate

American Association for the Advancement of Science (AAAS) | April 21st, 2021

Summary

Groundwater is an important source of drinking and irrigation water. Dating groundwater informs its vulnerability to contamination and aids in calibrating flow models. He

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Groundwater Sustainability Plan Antelope Subbasin

Tehama County Flood Control and Water Conservation District | January 31st, 2022

Summary

For the full 4,074-page file, go to the Tehama County Flood Control and Water Conservation District or the California Department of Water Resources (DWR).

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Groundwater Sustainability Plan Bowman Subbasin

Tehama County Flood Control and Water Conservation District | January 31st, 2022

Summary

The Bowman Subbasin, which is entirely located within Tehama County, is comprised of approximately 122,500 acres, and relies on an average of approximately 5,200 acre-fe

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Groundwater Sustainability Plan for Big Valley (Lake County) Basin

Lake County Watershed Protection District | January 31st, 2022

Summary

The purpose of this Groundwater Sustainability Plan (GSP) is to verify and maintain sustainable groundwater management in the Big Valley Groundwater Basin (Basin Number 5

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Groundwater Sustainability Plan Implementation: A Guide to Annual Reports, Periodic Evaluations, and Plan Amendments

California Department of Water Resources (DWR) | October 15th, 2023

Summary

This document provides guidance to groundwater sustainability agencies (GSAs) preparing Annual Reports, Periodic Evaluations, and Groundwater Sustainability Plan (GSP or

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Groundwater Sustainability Plan Los Molinos Subbasin

Theama County Flood Control and Water Conservation District | January 31st, 2022

Summary

The Los Molinos Subbasin (DWR Subbasin No. 5-021.56) of the Sacramento Valley Groundwater Basin was assigned a medium priority designation by DWR and is required to submi

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Sacramento River

Groundwater Quality in the Yuba River and Bear River Watersheds, Sierra Nevada, California

Groundwater Quality Protection Strategy for the Central Valley Region, a Roadmap - Addendum 2015/2016

Groundwater Quality Protection Strategy: A "Roadmap" for the Central Valley Region

Groundwater Quality Protection Strategy: A “Roadmap” for the Central Valley Region

Groundwater residence time estimates obscured by anthropogenic carbonate

Groundwater Sustainability Plan Antelope Subbasin

Groundwater Sustainability Plan Bowman Subbasin

Groundwater Sustainability Plan for Big Valley (Lake County) Basin

Groundwater Sustainability Plan Implementation: A Guide to Annual Reports, Periodic Evaluations, and Plan Amendments

Groundwater Sustainability Plan Los Molinos Subbasin

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