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Welcome to the home page of the Main San Gabriel Basin Watermaster, an agency charged with administering adjudicated water rights and devoted to the management and protection of groundwater resources, within the watershed and groundwater basin known as the Main San Gabriel Groundwater Basin in Los Angeles County, California.
To learn more, please visiit www.thewatersthatconnectus.com
Key Well Level
Historic Low: 169.4 ft. November 21, 2018
Historic High: 295.30 ft.* July 20, 1983
Current Level: 244.9 ft. As of November 22, 2024
Since entry of judgment, 1973
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