North Lahontan

The North Lahontan region is located in the northeastern part of the state, encompassing part of the western Great Basin and the eastern slopes of the Cascade Range and the Sierra Nevada. It includes arid high deserts as well as the California portion of the Lake Tahoe Basin. The region covers 6,122 square miles and accounts for 4% of California’s total land area, but is sparsely populated, being home to only 0.3% of the state’s population.

100 years of California's water rights system: patterns, trends and uncertainty

Environmental Research Letters (IOP) | August 19th, 2014

Summary

For 100 years, California’s State Water Resources Control Board and its predecessors have been responsible for allocating available water supplies to beneficial uses,

2019 Annual Compliance Report California Drinking Water Program

California State Water Resources Control Board (SWRCB) | May 1st, 2020

Summary

The State Water Resources Control Board (State Water Board) Division of Drinking Water (DDW) is the primacy agency responsible for the administration and enforc

2020 Water Resilience Portfolio (draft)

California Natural Resources Agency (CNRA) | January 2nd, 2020

Summary

2021 Drinking Water Needs Assessment

California State Water Resources Control Board (SWRCB) | April 9th, 2021

Summary

In 2016, the California State Water Resources Control Board (State Water Board) adopted a Human Right to Water Resolution making the Human Right to Water (HR2W), as defin

2022 Annual Water Supply and Demand Assessment Summary Report

California Department of Water Resources (DWR) | November 22nd, 2022

Summary

This summary report contains projected water shortage information at the urban water supplier level as well as regional and statewide analyses of water supply conditions

2022 Drinking Water Needs Assessment

California State Water Resources Control Board (SWRCB) | April 30th, 2022

Summary

The Needs Assessment is comprised of Risk, Affordability, and Cost Assessment components. Enhancement of the 2022 Needs Assessment consisted of internal workgroup recomme

2022 Drought Plan Klamath Project, Oregon-California Interior Region 10, California-Great Basin

U.S. Bureau of Reclamation (USBR) | April 29th, 2022

Summary

The Klamath Project (Project) delivers water for irrigation purposes to up to approximately 230,000 acres in southern Oregon and northern California when water is availab

2023 Annual Water Supply and Demand Assessment Summary Report

California Department of Water Resources (DWR) | September 30th, 2023

Summary

This annual report summarizes the Department of Water Resources’ (DWR’s) review of Urban Water Suppliers’ Annual Water Shortage Assessment Reports (Annual Shortage

2023 Drinking Water Needs Assessment

California State Water Resources Control Board (SWRCB) | April 30th, 2023

Summary

The Needs Assessment is comprised of four core components: the Failing Water System List (Failing list), the Risk Assessment, the Cost Assessment, and the Affordability A

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