California Groundwater Monitoring Wells from Technical Support Projects

California's Department of Water Resources has completed 234 monitoring wells at 92 sites across 35 groundwater subbasins through its Technical Support Services program. The dataset includes well identifiers, site codes, and links to completion reports and groundwater level data. It supports the implementation of Groundwater Sustainability Plans across the state.

Use Cases

• Map well locations and site codes to analyze the spatial distribution of monitoring infrastructure across 35 subbasins.
• Link State Well Numbers to Well Completion Report numbers for tracking construction and regulatory documentation.
• Correlate well data with groundwater level time series from external systems like CASGEM or the SGMA Portal.
• Analyze project scale by aggregating the count of wells per site code to identify areas with concentrated monitoring efforts.

Strengths

• Contains 234 completed monitoring wells, providing a substantial network of observation points.
• Well-defined provenance with each well assigned a State Well Number and linked to official regulatory reports.
• Geographic scope covers 35 groundwater subbasins across California, offering broad spatial coverage.
• Publicly accessible with connections to interactive GIS maps and the Water Data Library for further exploration.

Limitations

• The core dataset appears to be a directory of well identifiers; analytical data like water levels or chemistry requires joining with external sources.
• Temporal coverage for the actual groundwater measurements is not specified within this dataset description.
• Potential for incomplete records if not all wells have been registered in the referenced online systems (CASGEM, MNM).

Provenance

Source

State of California Department of Water Resources (DWR)

Collection Method

Compiled from DWR's Technical Support Services program projects involving well construction, equipment installation, and data collection.

Time Range

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Freshness

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Geography

California, USA, spanning 35 groundwater subbasins.