Colorado River

Statement of Findings regarding the Approval of the Coachella Valley - Indio Subbasin Alternative Groundwater Sustainability Plan

California Department of Water Resources (DWR) | June 17th, 2019

Statement of Findings regarding the Approval of the Coachella Valley – San Gorgonio Pass Subbasin Groundwater Sustainability Plan

California Department of Water Resources (DWR) | October 26th, 2023

Statement of Findings Regarding the Approval of the Mission Creek Subbasin Alternative Groundwater Sustainability Plan

California Department of Water Resources (DWR) | July 17th, 2019

Statement of Findings regarding the Periodic Review and Approval of the Coachella Valley - Indio Subbasin Alternative Groundwater Sustainability Plan

California Department of Water Resources (DWR) | June 27th, 2024

Statement of Findings Regarding the Periodic Review of Alternative Groundwater Sustainability Plan Coachella Valley – Mission Creek Subbasin (No. 7-021.02)

California Department of Water Resources (DWR) | June 27th, 2024

Status of 2020 Agricultural Water Management Plans and Implementation of Efficient Water Management Practices Report

California Department of Water Resources (DWR) | January 25th, 2024

As required by the California Water Code (CWC), Agricultural Water Suppliers (AWS) must implement Efficient Water Management Practices (EWMPs) and submit an Agricultural

As required by the California Water Code (CWC), Agricultural Water Suppliers (AWS) must implement Efficient Water Management Practices (EWMPs) and submit an Agricultural Water Management Plan (AWMP) to the Department of Water Resources (DWR) every five years. Agricultural Water Suppliers subject to United States Bureau of Reclamation (Reclamation) requirements for a Water Conservation Plan (Reclamation Plan) may submit those plans to DWR in lieu of an AWMP. DWR then reports to the Legislature on the status of AWMPs, including outstanding elements, and implementation of EWMPs or Reclamation Best Management Practices (EWMPs/BMPs). This legislative report addresses the requirements for reporting on AWMPs and EWMPs in a single report that documents the status of AWMP submittals and the implementation of associated EWMPs. This report is the final Legislative report on EWMPs under CWC Section 10608.48(g).

Status of 2020 Urban Water Management Plans

California Department of Water Resources (DWR) | July 25th, 2023

As required by the California Water Code (CWC), every five years Urban Water Suppliers must submit an Urban Water Management Plan (UWMP) to the Department of Water Resour

As required by the California Water Code (CWC), every five years Urban Water Suppliers must submit an Urban Water Management Plan (UWMP) to the Department of Water Resources (DWR). DWR then reports to the Legislature on the status of UWMPs and Water Shortage Contingency Plans (WSCPs) and exemplary elements. Key Findings: * 95% (417 of 438) of Urban Water Suppliers submitted plans. * 97% (374 of 386) of Urban Retail Suppliers that submitted UWMPs met their water use reduction targets. * Statewide per capita urban water use was down 32% by 2020 from baseline period (suppliers identify a continuous 10-year or 15-year baseline period between 1995 and 2010). * 94% (393 of 417) of Urban Water Suppliers anticipate being able to manage any water shortages by implementing their Water Shortage Contingency Plans.

Status of Groundwater Quality in the California Desert Region, 2006–2008: California GAMA Priority Basin Project

U.S. Geological Survey (USGS) | January 9th, 2013

Groundwater quality in six areas in the California Desert Region (Owens, Antelope, Mojave, Coachella, Colorado River, and Indian Wells) was investigated as part

Groundwater quality in six areas in the California Desert Region (Owens, Antelope, Mojave, Coachella, Colorado River, and Indian Wells) was investigated as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The GAMA Priority Basin Project is being conducted by the California State Water Resources Control Board in collaboration with the U.S. Geological Survey (USGS) and the Lawrence Livermore National Laboratory. The six Desert studies were designed to provide a spatially unbiased assessment of the quality of untreated groundwater in parts of the Desert and the Basin and Range hydrogeologic provinces, as well as a statistically consistent basis for comparing groundwater quality to other areas in California and across the Nation. Samples were collected by the USGS from September 2006 through April 2008 from 253 wells in Imperial, Inyo, Kern, Los Angeles, Mono, Riverside, and San Bernardino Counties. Two-hundred wells were selected using a spatially distributed, randomized grid-based method to provide a spatially unbiased representation of the study areas (grid wells), and ffty-three wells were sampled to provide additional insight into groundwater conditions (additional wells). The status of the current quality of the groundwater resource was assessed based on data from samples analyzed for volatile organic compounds (VOCs), pesticides, and inorganic constituents such as major ions and trace elements. Water-quality data from the California Department of Public Health (CDPH) database also were incorporated in the assessment. The status assessment is intended to characterize the quality of untreated groundwater resources within the primary aquifer systems of the Desert Region, not the treated drinking water delivered to consumers by water purveyors. The primary aquifer systems (hereinafter, primary aquifers) in the six Desert areas are defined as that part of the aquifer corresponding to the perforation intervals of wells listed in the CDPH database.

Strategic stream gauging network design for sustainable water management

Nature Portfolio (Springer Nature) | June 3rd, 2024

Stream gauging stations that monitor the flow of water in rivers and streams provide critical information to water managers, but biases and gaps in gauge placement, compo

Stream gauging stations that monitor the flow of water in rivers and streams provide critical information to water managers, but biases and gaps in gauge placement, compounded by gauge deactivations, limit our ability to track river flows and address global water challenges. Here we introduce an approach for identifying gauging sites to efficiently fill gaps in monitoring coverage within river networks while also addressing water management priorities, including reservoir operations, biodiversity conservation and hydroclimatic monitoring. Applying this approach to gauges in California, United States, we found substantial gaps in the stream monitoring network. Hypothetically reconfiguring gauges to locations that maximize coverage and representation of management objectives highlights the current network’s biases. Through the strategic reactivation and placement of additional gauges, we demonstrate how stream gauging networks can be designed to support sustainable water management.

Studies of Geology and Hydrology in the Basin and Range Province, Southwestern United States, For Isolation of High-Level Radioactive Waste Characterization of the Sonoran Region, California

U.S. Geological Survey (USGS) | July 15th, 1989

A study by the U.S. Geological Survey to evaluate potential hydrogeologic environments for isolation of high-level radioactive waste in the Basin and Range physiographic

A study by the U.S. Geological Survey to evaluate potential hydrogeologic environments for isolation of high-level radioactive waste in the Basin and Range physiographic province of the southwestern United States was begun in May 1981, with the introduction of the study to the Governors of eight Basin and Range States Arizona, California, Idaho, Nevada, New Mexico, Oregon, Texas, and Utah and to respective Indian tribes in those States. Accordingly, these States were invited to participate in the study by designating an earth scientist to serve on a Province Working Group with the U.S. Geological Survey membership of the working group is shown following the title page. State representatives have provided consultation in selecting guidelines, assembling geologic and hydrologic data, and assessing such information to identify environments that meet the guidelines for further study.