Colorado River Study UnitThe Colorado River Study Unit was sampled between 10/1/2007 and 12/20/2007; 28 wells were sampled. The study unit consists of 1 study area. Colorado River Basins area, consisting of 3 groundwater basins ( • Needles Valley, • Palo Verde Valley, • Yuma Valley) The study unit is within the San Bernardino, Riverside and Imperial counties. References to non-U.S. Department of the Interior (DOI) products do not constitute an endorsement by the DOI. By viewing the Google Maps API on this web site the user agrees to these Terms of Service set forth by Google.
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