Inventory of Statewide Brackish Groundwater Resources

Our services entailed compiling and analyzing data, investigating favorable areas, and reporting on the study findings. We not only identified five potentially favorable areas for developing brackish water supplies but also projected the impacts to existing users if these sources were developed.


In inland areas of the southwestern U.S. and other parts of the world, desalinating groundwater is a feasible option for increasing limited water supplies in response to escalating demands. Brackish water has TDS concentrations between 1,000–10,000 mg/L — roughly equivalent to an EC of 1,600 to 17,000 uS/cm.


  • Prepared a comprehensive database of well construction, water level, and water quality data from publicly available sources
  • Organized data to identify areas where brackish groundwater met our minimum criteria for volume and well yield
  • Prepared statewide maps showing the distribution of EC and TDS values, water level conditions, and estimated volumes of brackish groundwater in storage
  • Constructed a matrix of relevant factors for areas containing brackish groundwater — anticipated well yields, estimated volume of groundwater in storage, depth to groundwater, and estimated TDS concentrations
  • Reviewed hydrogeologic data and reports and estimated the potential for developing more than 10,000 AF/yr from each brackish groundwater basin / area; identified five areas warranting further investigation
  • Researched and documented aquifer properties
  • Identified the sources of, and contributors to, brackish groundwater
  • Evaluated the likelihood of changes in land use or water chemistry over time