San Dieguito Groundwater Study

About the Study
Project Importance
About the Potential Project
Cost
Public Meetings
Next Steps
For More Information


About the Study

OMWD is studying the possibility of developing a local water supply through a groundwater desalination project in the San Dieguito Valley utilizing grant funding from California’s Department of Water Resources.

The study will take place through 2017 and will analyze:

  1. The amount of groundwater that could be extracted from the basin on a sustainable basis without impacting the environment or current water users
  2. Groundwater quality
  3. Methods of groundwater treatment
  4. Identification of adequate land for the wells, treatment facility, and brine disposal necessary to operate the potential project
  5. Costs associated with producing the new local water supply
  6. Whether the expense of producing the new water supply is  cost-efficient when compared to the cost of developing other potable water supplies

If the study yields positive results, OMWD may move forward with an environmental impact analysis and construction of a groundwater desalination project.

study area mapStudy Area Map

Project Importance

OMWD is heavily reliant on imported water, much of which comes from far-off places like the Sacramento-San Joaquin Bay-Delta and Colorado River. The development of a local, sustainable water source like this one is becoming increasingly important as imported water costs continue to rise and water availability becomes more uncertain. Local sources also provide water supply redundancy should imported supplies be cut off.

About the Potential Project

The potential project would extract groundwater from wells located in the San Dieguito Valley Groundwater Basin and deliver it to a nearby desalination facility. Treated through reverse osmosis, a filtration process that improves water quality by removing impurities such as salts, hardness, and other dissolved minerals, the water would be available for uses like drinking and fire protection.

The groundwater used to create this supply for OMWD customers would be above and beyond that already being used by existing groundwater users. In other words, customers already using groundwater through a private well would not be impacted.

Cost

Project costs will be calculated as part of the study. The project would be paid for through OMWD capital improvement funds and developer fees, as well as potential state and federal grants.

The water supply would need to be produced at a cost that is comparable to developing other local potable water supplies in order to be considered feasible. OMWD has anticipated this cost in its long-term financial planning.

Public Meetings

Public outreach meetings will be planned to discuss the project with local residents and area stakeholders. Meeting dates and times will be posted here as they are confirmed.

Next Steps

The study will continue throughout 2017. Once all data has been gathered and analyzed, OMWD’s board will decide whether the project moves forward. With board approval, OMWD could begin producing a new, locally sourced drinking water supply as early as 2020.

For More Information

For more information about the study or potential project, please contact Joey Randall, OMWD Assistant General Manager, at 760-753-6466.