After five years of drought, rain and snowstorms in Northern and Central California in the winter of 2016-2017 improved water supply conditions in the state in 2017. According to the U.S. Drought Monitor, as of April 18, 2017, less than 1% of the state was in severe drought conditions. This represents a drastic improvement from one year ago, when 73% of the state was in severe drought conditions, and two years ago, when 92% fell under this designation. The stress on water supplies due to the drought resulted in cutbacks in water deliveries to contractors receiving water from the CVP and SWP. In 2015, California Governor Jerry Brown mandated the first-ever 25% statewide reduction in water use for nonagricultural users. For the first time in years, water allocations for most CVP water contractors were 100%. Although some contractors south of the Sacramento and San Joaquin Rivers' Delta (Bay Delta) received a lower allocation in the initial March 2017 announcement (65% for agricultural contractors and 90% for municipal and industrial contractors, respectively), Reclamation subsequently revised these allocations upward to 100% in April. Legislation enacted in the 114 th Congress (Subtitle J of S. 612 , the Water Infrastructure Improvements for the Nation ([WIIN] Act) incorporated provisions from multiple California drought-related bills that had been considered dating to the 112 th Congress. These provisions directed pumping to "maximize" water supplies for the CVP (in accordance with applicable biological opinions), allowed for increased pumping during certain high water events, and authorized expedited reviews of water transfers. This report provides high-level summary information on recent hydrologic conditions in California and their impact on state and federal water management, with a focus on deliveries related to the federal CVP. Federal and State Water Project Deliveries

Proposals and debates related to water allocations in California typically revolve around the two major water projects that serve the state's agricultural and municipal water suppliers: the federal CVP and the state of California's SWP. 2017 Allocations

In a series of announcements in February, March, and April 2017, Reclamation provided its initial allocations for the 2017 water year (see Table 1 , below). Reclamation previously had noted that its lower initial allocation for SOD agricultural water service contractors was largely a result of two factors: (1) a conservative estimate of water supplies expected to be added to the system for the remainder of the year (thus, if the remainder of the year is not abnormally dry, the initial allocation might increase) and (2) limits to available water supplies in the federal half of San Luis Reservoir (an important provider of SOD water storage) due to rescheduled and carryover water from 2016. For 2016 and 2017, SWP water deliveries were significantly higher than they were in 2015 (when deliveries were limited to 20%). Some of these effects may linger for years. In many years, pumping restrictions to protect state-set water quality levels, particularly increases in salinity levels, are greater than restrictions to protect endangered species. Ongoing cutbacks to CVP contractor allocations during times of increased water supplies have caused continuing criticism of Reclamation's operation of the CVP. In recent years, debates have focused on the extent to which factors other than drought (e.g., endangered species and water quality requirements) have led to curtailments. Legislation in the 115th Congress

Similar to recent congresses, the 115 th Congress is expected to consider new legislation that proposes additional changes to CVP operations. H.R. 23 , the Gaining Responsibility on Water Act (GROW Act) incorporates a number of provisions that were included in previous legislation in the 112 th , 113 th , and 114 th Congresses but were not enacted in the final version of the WIIN Act. Congress may consider this and similar legislation, as well as oversight of CVP operations and implementation of WIIN Act CVP provisions.
After five years of drought, rain and snowstorms in Northern and Central California in the winter of 2016-2017 significantly improved water supply conditions in the state in 2017. According to the U.S. Drought Monitor, as of late April 2017, less than 1% of the state was in severe drought conditions. This represents an improvement from one year prior to that date, when 73% of the state was in severe drought conditions, and two years prior, when 92% fell under this designation.
Stress on water supplies due to drought resulted in cutbacks in water deliveries to districts receiving water from federal and state facilities, in particular the federal Central Valley Project (CVP, operated by the Bureau of Reclamation) and the State Water Project (SWP, operated by the State of California). In 2015, California mandated a 25% reduction in water use for nonagricultural water users, and overall SWP deliveries were limited to 20% of contractor requests. Some of these restrictions have since been relaxed.
Reclamation estimated its initial water allocations for CVP contractors for the 2017 water year in a series of announcements in February, March, and April 2017. For the first time in years, initial water allocations for most CVP water contractors were 100%. Contractors south of the Sacramento and San Joaquin Rivers' Delta (Bay Delta) initially received lower allocations in March 2017 (65% for agricultural contractors and 90% for municipal and industrial contractors, respectively), but Reclamation subsequently revised these allocations upward to 100% in April. The allocations represented a drastic change from recent years, in which no supplies were made available to many of these contractors, who farm some of the most valuable irrigated agricultural land in the country.
Most expect that the historically wet conditions of 2016-2017 will not continue in future years and that future water years will continue to see deliveries limited to some extent. Previous cutbacks to CVP deliveries (in particular during periods of increased precipitation) have caused some to criticize Reclamation's management of the CVP and question the extent to which factors beyond limited water supplies (e.g., restrictions to protect endangered species and water quality) influence water management and the quantity of water delivered to contractors. They argue that congressionally directed changes in the operation of the CVP that would result in increases to water allocations are needed. Other stakeholders argue that some of these changes could undercut environmental regulations, harm fish and wildlife, and potentially lower water quality. They also worry that legislative proposals that would alter the implementation of the Endangered Species Act could harm species in the region and set a precedent that could be used to affect other listed species in the future.
Legislation enacted in the 114th Congress (Subtitle J of S. 612, the Water Infrastructure Improvements for the Nation [WIIN] Act) incorporated provisions from multiple California drought-related bills that had been considered dating to the 112th Congress. Among other things, these provisions directed pumping to "maximize" water supplies for the CVP (in accordance with applicable biological opinions), allowed for increased pumping during certain high water events, and authorized expedited reviews of water transfers.
Similar to recent congresses, the 115th Congress is considering legislation that proposes additional changes to CVP operations. H.R. 23, the Gaining Responsibility on Water Act (GROW Act) incorporates a number of provisions that were included in previous legislation but were not in the final version of the WIIN Act. Congress may consider this and similar legislation, as well as oversight of CVP operations and implementation of WIIN Act CVP provisions.
This report provides an abbreviated background on the CVP and SWP. It also provides a summary of recent hydrologic conditions in California and their effect on water deliveries.