This Well Completion Report geospatial dataset represents an index to a subset of records available from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This release contains water supply well records from Amador, Calaveras, El Dorado, Nevada, Placer, Sacramento, San Bernardino, Sutter, and Yuba counties. The USGS California Water Science Center GAMA project has provided additional attributes: top of open interval; number of open intervals; and various other identifiers such as public supply well number and USGS site number where they can be identified. In some cases, locations are georeferenced to finer resolution based on county APN or 911 geospatial datasets. The attributed information is linked to the redacted publicly available image when the link can be resolved. This dataset is for information purposes only. All attribute values should be verified by reviewing the original Well Completion Report. California Water Code Section 13752 allows for the release of redacted copies of well completion reports to the public. DWR is the authoritative source of these data. https://data.ca.gov/dataset/well-completion-reports

This Well Completion Report dataset represents an index of records from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This dataset is for informational purposes only. All attribute values should be verified by reviewing the original Well Completion Report. Known issues include: - Missing and duplicate records - Missing values (either missing on original Well Completion Report, or not key entered into database) - Incorrect values (e.g. incorrect Latitude, Longitude, Record Type, Planned Use, Total Completed Depth) - Limited spatial resolution: The majority of well completion reports have been spatially registered to the center of the 1x1 mile Public Land Survey System section that the well is located in.

This feature class represents an index of records from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This feature class is for informational purposes only. All attribute values should be verified by reviewing the original Well Completion Report. Known issues include: - Missing and duplicate records - Missing values (either missing on original Well Completion Report, or not key entered into database) - Incorrect values (e.g. incorrect Latitude, Longitude, Record Type, Planned Use, Total Completed Depth) - Limited spatial resolution: The majority of well completion reports have been spatially registered to the center of the 1x1 mile Public Land Survey System section that the well is located in.,

This feature class represents an index of records from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This feature class is for informational purposes only. All attribute values should be verified by reviewing the original Well Completion Report. Known issues include: - Missing and duplicate records - Missing values (either missing on original Well Completion Report, or not key entered into database) - Incorrect values (e.g. incorrect Latitude, Longitude, Record Type, Planned Use, Total Completed Depth) - Limited spatial resolution: The majority of well completion reports have been spatially registered to the center of the 1x1 mile Public Land Survey System section that the well is located in.,

This feature class represents an index of records from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This feature class is for informational purposes only. All attribute values should be verified by reviewing the original Well Completion Report. Known issues include: - Missing and duplicate records - Missing values (either missing on original Well Completion Report, or not key entered into database) - Incorrect values (e.g. incorrect Latitude, Longitude, Record Type, Planned Use, Total Completed Depth) - Limited spatial resolution: The majority of well completion reports have been spatially registered to the center of the 1x1 mile Public Land Survey System section that the well is located in.,

This data release was prepared as part of an agreement between the California Department of Water Resources (DWR) and the United States Geological Survey (USGS) to support the Sustainable Groundwater Management Act (SGMA). Of the many components of that agreement, there is a specific task requiring the Enhancement of Digital Well Completion Reports. Well-completion reports (WCRs) contain information about the wells, such as construction characteristics and lithologic data that is very valuable to SGMA. The data set presented here is a compilation of lithologic information transcribed verbatim from a subset of WCRs contained in the DWR Online System for Well Completion Reports (OSWCR). The format of the lithologic descriptions follows the DWR free form entry method, which allows for any material description to be entered into the OSWCR without standardization. The lithologic descriptions for all depth intervals recorded (in feet below land surface) by the driller on the WCR are captured verbatim, with no regularization or correction for typographical or spelling errors. Some degree of data processing may be required by a user of this dataset depending on its intended use. This data release is intended to be updated as new WCRs are transcribed over time. WCR lithologic data featured in version 1.0 (published March 2023) focused on 5,841 WCRs from many types of wells located primarily along the length of the California Aqueduct in the Central Valley of California. WCR lithologic data added in version 2.0 (published June 2024) were from 4,958 select public-supply wells from throughout the state that had previously been included in a compilation of WCR location and construction data made by the USGS Groundwater Ambient Monitoring and Assessment-Priority Basin Project (GAMA-PBP). WCR lithologic data added in this version 3.0 (published July 2025) are from 8,448 more public-supply wells from throughout the state. As of July 2025, approximately 57 percent of the WCRs in this dataset are also in the GAMA-PBP compilation of refined location information and construction characteristic data from WCRs primarily from water-supply wells in select locations throughout the State (Borkovich and others, 2025; https://doi.org/10.5066/P93ICKAF). Subsequent revisions planned for the GAMA-PBP data release include compiling refined location information and construction characteristic data for more WCRs with lithologic data in this data release. The GAMA-PBP data release includes a flag to indicate which WCRs also have lithologic data compiled in this data release. All attributed values should be verified by reviewing the original WCR which can be retrieved from the California Open Data Portal WCR website (California DWR, 2025): https://data.ca.gov/dataset/well-completion-reports California Water Code Section 13752 allows for the release of redacted copies of well completion reports to the public. DWR is the authoritative source of these data. Version 1.0 posted March 28, 2023 Version 2.0 posted June 12, 2024 Version 3.0 posted July 18, 2025

The Department of Water Resources (DWR) Enterprise Monitoring Well Network dataset contains information regarding wells monitored by DWR. The wells included in this dataset have been completed, a well completion report (WCR) has been submitted through the 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). This dataset will be updated on a monthly basis.