Water Source & Quality

During calendar year 2014, the water supply for the City of Sierra Madre came from three sources:

  1. groundwater from wells in the East Raymond Basin,
  2. natural spring tunnel located in the foothills,
  3. treated surface water from Metropolitan Water District of Southern California

* All water is treated with chlorine disinfection or chloramines disinfection before it is delivered to the residents’ home.

The City of Sierra Madre is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When water has been sitting for several hours, residents can minimize the potential for lead exposure by flushing the tap (for 30 seconds to 2 minutes) before using water for drinking or cooking. Those that are concerned about lead in the water; may wish to have their water tested.

2015 Water Quality Report
2014 Water Quality Report