(Webpage Under Development) The Department of Water Resources (DWR) provides Technical Support Services (TSS) to assist Groundwater Sustainability Agencies (GSAs) with the implementation of their Groundwater Sustainability Plans (GSPs) and other local entities to better understand groundwater conditions. These services support data collection, groundwater monitoring, and improved understanding of groundwater conditions to help advance sustainable groundwater management efforts across California. Through the TSS program, DWR has partnered with GSAs and other entities on projects across the state to drill and construct groundwater monitoring wells, install groundwater level recording and telemetry equipment, perform downhole camera and geophysical surveys, and collect and analyze groundwater for general chemistry. The data and reports generated from these efforts are publicly available to support ongoing groundwater management and planning. Additional information can be found on the Assistance and Engagement webpage. #Summary of Completed TSS Projects To date, DWR has completed TSS projects in 35 groundwater subbasins, constructing 234 monitoring wells at 92 sites statewide. Each of these wells have been assigned a State Well Number (SWN), have had a Well Completion Report (WCR) submitted to DWRs Online System for Well Completion Reports (OSWCR), and have been registered either through the California Statewide Groundwater Elevation Monitoring (CASGEM) Online System or the Sustainable Groundwater Management Act (SGMA) Portal’s Monitoring Network Module (MNM). Groundwater level data from these wells are collected by the GSA or DWR and submitted to CASGEM and/or the MNM. These data can be viewed on the Water Data Library (WDL). WCRs for these wells can be found using the Well Completion Report Map Application. A summary table of completed TSS wells including their associated well name(s), site code(s), SWN(s), and WCR number(s), can be viewed and/or downloaded here: DWR Completed TSS Wells An interactive GIS map containing a feature set of all completed TSS wells can be accessed here: GIS Map of Completed TSS Wells The individual TSS well locations, associated borehole lithologic information, and groundwater level data can be viewed on the SGMA Data Viewer by: 1. Checking the “DWR TSS Wells” box under the “Groundwater Levels” tab on the left side of the screen. 2. Clicking on any one of the well location symbols that appear on the interactive map. 3. Clicking on one of the associated Site Code numbers that appear in the results table. #Completed TSS Projects by Groundwater Subbasin Below is a list of subbasins in which TSS projects have been completed. These projects are organized by DWR Region (Northern Region, North Central Region, South Central Region, and Southern Region). Each subbasin listed below has one or more completed TSS project. As more TSS projects are completed, they will be added to this list. All completed TSS projects have several associated documents and datasets, including a Well Installation Summary Report, TSS Agreement between DWR and the GSA, CEQA Notice of Exemption (NOE), Land Use or License Agreement, Local Drilling Permit, Composite Lithologic Log, Survey Report, and a Water Quality Analytical Report. Some projects also include downhole geophysical logs. These data and reports can be accessed by clicking on the subbasin below in which the project is located. ##Northern Region Antelope Subbasin Big Valley Subbasin Butte Valley Subbasin Colusa Subbasin Corning Subbasin Enterprise Subbasin Red Bluff Subbasin Shasta Valley Subbasin Sierra Valley Subbasin Wyandotte Creek Subbasin ##North Central Region Cosumnes Subbasin Eastern San Joaquin Subbasin North Yuba Subbasin Petaluma Valley Subbasin Santa Rosa Plain Subbasin Solano Subbasin Sonoma Valley Subbasin South Yuba Subbasin Tracy Subbasin Ukiah Valley Subbasin Yolo Subbasin ##South Central Region Delta Mendota Subbasin Kaweah Subbasin Kern County Subbasin Kings Subbasin Paso Robles Area Subbasin Tule Subbasin Turlock Subbasin ##Southern Region Borrego Springs Subbasin Cuyama Valley Subbasin Indian Wells Subbasin Indio Subbasin Mound Subbasin Oxnard Plain Subbasin Pleasant Valley Subbasin

(Webpage Under Development) The Department of Water Resources (DWR) provides Technical Support Services (TSS) to assist Groundwater Sustainability Agencies (GSAs) with the implementation of their Groundwater Sustainability Plans (GSPs) and other local entities to better understand groundwater conditions. These services support data collection, groundwater monitoring, and improved understanding of groundwater conditions to help advance sustainable groundwater management efforts across California. Through the TSS program, DWR has partnered with GSAs and other entities on projects across the state to drill and construct groundwater monitoring wells, install groundwater level recording and telemetry equipment, perform downhole camera and geophysical surveys, and collect and analyze groundwater for general chemistry. The data and reports generated from these efforts are publicly available to support ongoing groundwater management and planning. Additional information can be found on the Assistance and Engagement webpage. Summary of Completed TSS Projects To date, DWR has completed TSS projects in 35 groundwater subbasins, constructing 234 monitoring wells at 92 sites statewide. Each of these wells have been assigned a State Well Number (SWN), have had a Well Completion Report (WCR) submitted to DWRs Online System for Well Completion Reports (OSWCR), and have been registered either through the California Statewide Groundwater Elevation Monitoring (CASGEM) Online System or the Sustainable Groundwater Management Act (SGMA) Portal’s Monitoring Network Module (MNM). Groundwater level data from these wells are collected by the GSA or DWR and submitted to CASGEM and/or the MNM. These data can be viewed on the Water Data Library (WDL). WCRs for these wells can be found using the Well Completion Report Map Application. A summary table of completed TSS wells including their associated well name(s), site code(s), SWN(s), and WCR number(s), can be viewed and/or downloaded here: DWR Completed TSS Wells An interactive GIS map containing a feature set of all completed TSS wells can be accessed here: GIS Map of Completed TSS Wells The individual TSS well locations, associated borehole lithologic information, and groundwater level data can be viewed on the SGMA Data Viewer by: Checking the “DWR TSS Wells” box under the “Groundwater Levels” tab on the left side of the screen. Clicking on any one of the well location symbols that appear on the interactive map. Clicking on one of the associated Site Code numbers that appear in the results table. Completed TSS Projects by Groundwater Subbasin Below is a list of subbasins in which TSS projects have been completed. These projects are organized by DWR Region (Northern Region, North Central Region, South Central Region, and Southern Region). Each subbasin listed below has one or more completed TSS project. As more TSS projects are completed, they will be added to this list. All completed TSS projects have several associated documents and datasets, including a Well Installation Summary Report, TSS Agreement between DWR and the GSA, CEQA Notice of Exemption (NOE), Land Use or License Agreement, Local Drilling Permit, Composite Lithologic Log, Survey Report, and a Water Quality Analytical Report. Some projects also include downhole geophysical logs. These data and reports can be accessed by clicking on the subbasin below in which the project is located. Northern Region Antelope Subbasin Big Valley Subbasin Butte Valley Subbasin Colusa Subbasin Corning Subbasin Enterprise Subbasin Red Bluff Subbasin Shasta Valley Subbasin Sierra Valley Subbasin Wyandotte Creek Subbasin North Central Region Cosumnes Subbasin Eastern San Joaquin Subbasin North Yuba Subbasin Petaluma Valley Subbasin Santa Rosa Plain Subbasin Solano Subbasin Sonoma Valley Subbasin South Yuba Subbasin Tracy Subbasin Ukiah Valley Subbasin Yolo Subbasin South Central Region Delta Mendota Subbasin Kaweah Subbasin Kern County Subbasin Kings Subbasin Paso Robles Area Subbasin Tule Subbasin Turlock Subbasin Southern Region Borrego Springs Subbasin Cuyama Valley Subbasin Indian Wells Subbasin Indio Subbasin Mound Subbasin Oxnard Plain Subbasin Pleasant Valley Subbasin