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Groundwater Cleanup

Welcome to the Underground Storage Tank and Site Cleanup webpage

Groundwater is one of California’s greatest natural resources, making up a significant portion of the state’s water supply and serving as a buffer against the impacts of drought and climate change.  However, contamination of groundwater supplies (from both natural- and man-made causes) can render a groundwater basin unusable as a drinking water source, as well as for agricultural, industrial, and other uses. If contamination of groundwater occurs through an accidental spill, careless dumping of chemicals, or a tank leak, the next step is to clean up the pollution that has impacted the groundwater (as well as the soil, air, and surface water) so that water quality is restored. The Water Boards restores groundwater quality through multiple programs and actions and coordinating with other agencies.

UST Leak Prevention

Opens the Leak Prevention Program page

UST Cleanup Program

Opens the Underground Storage Tank Cleanup Programe page

Site Cleanup Program

Opens the Site Cleanup Program page


Opens the GeoTracker Electronic Submittal of Information (ESI) page

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For UST vapor recovery information, visit the Air Resources Board Website.

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