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Sustainable Groundwater Management Act


These maps are PDF files and can be large in file size. Please allow several seconds for the larger maps to load. (broadband speed) and be viewed. The quality of these maps allow for considerable amount of detail when zooming in. It is recommended to use the latest version of the free Adobe Reader to avoid any other problems viewing the maps.


Chino Basin Legal Boundary and Legal Description

2016 Depth to Ground Water Contours

2016 Chino Basin Groundwater Elevation Contours

Chino Basin Agency Water Service Areas

Chino Basin Hydrogeology - Areas Of Subsidence

2016 Chino Basin Groundwater Flow Direction & Relative Velocity

Recharge Basins Locations

Chino Groundwater Basin Management Zones and Surrounding Basins

2016 Contamination Plume Map

Converted Parcels and Eligible Parcels for Conversion and Voluntary Agreements - Whole Basin

Converted Parcels and Eligible Parcels for Conversion and Voluntary Agreements - Conversion Area 1 Only

MWD Agency Service Connection Map

MWD Member Agency Map

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Chino Basin Watermaster adheres to the highest professional standards in all of its data gathering and processing activities. However, Watermaster does not warrant the accuracy and usability of this data to third parties. Accordingly, the User of data and other information contained within this website agrees to protect, defend and hold harmless Watermaster and WEI, their officers, officials or employees from all claims, liabilities, expenses or damages of any nature, including attorneys fees, for any liabilities of any kind arising out of or in connection with the work, operation or activities of User, its agents, employees and subcontractors in the use of data or other information  obtained by  User  from  Watermaster’s website and/or FTP site.

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