The East County Advanced Water Purification Program is starting construction this summer. The Program create a new, local, sustainable and drought-proof drinking water supply using state-of- the-art technology to purify East San Diego County’s recycled water to produce up to 30% of the region’s drinking water. 

 The Program’s treatment facilities will be constructed just to the north of Santee Lakes. The purified water pipeline will travel east through Santee and Lakeside, ending at Lake Jennings. Two additional pipelines will be constructed south of the new facilities past Carlton Oaks Drive to a pump station just south of the Carlton Oaks golf course. Most of the pipeline work will be trenched, placed and covered in roadways. We realize there will be impacts from construction and we appreciate your patience with noise and road travel delays while work is underway.

Water-IMG_0525F-Photo by Melissa Jacobs

COmmunicating about construction

We are dedicated to communicating to potentially impacted communities, including residents, businesses and schools. Communication efforts will include mailers, email updates, road signs, interactive map, webpage updates and presentations to community groups through the project area.  If you have a question or would like to schedule a presentation to your group, please email us at

sign up to stay informed

The majority of the construction information and updates will be sent through emails and shared on the project website. Please sign up below to stay informed. 

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work schedule

Construction hours will vary throughout the duration of the project and depending on project elements being completed at that time. Sign up for updates to ensure you get the latest information on the days and hours of work near you. Construction for the entire project is expected to be complete in 2025 and water production will begin in 2026. 

construction map and elements

Construction includes the following:

  • Water recycling facility treating16 million gallon per day 
  • Advanced water purification facility treating 11.5 million gallon per day 
  • Solids handling facility and product water pump station
  • Purified water pipeline from the advanced water purification facility, north of Santee Lakes to Lake Jennings - 10.2 miles long 
  • Dechlorination facility and inlet to Lake Jennings
  • Retrofits and capacity expansions of an influent pump station and East Mission Gorge Pump Station
  • Force main pipeline - 3.5 miles long 
  • Residuals bypass pipeline - 3 miles long 
  • Lift station for a residuals bypass system processing 1.7 MGD