Water Quality
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Water Quality

The Estero Municipal Improvement District purchases treated water from the San Francisco Water Department and distributes it to Foster City and parts of San Mateo. The District monitors water quality to ensure that it meets state and federal drinking water quality standards.

The San Francisco Water Department also maintains web pages that contain information on cryptosporidium, lead and copper, water quality fact sheets, Annual Water Quality Reports, other reports and links to other web sites.

If you have any questions or need additional information regarding water service or water quality, such as reporting a water leak, broken hydrant, or any type of water issue, please contact the Public Works Maintenance Division.

Know what's in your water! View information on the Water Quality Report for the current year below:

Water Quality Report (Consumer Confidence Report)

The City of Foster City/Estero Municipal Improvement District (EMID) is pleased to present the current Water Quality Report (Consumer Confidence Report). We want to let customers know where our drinking water comes from, how it is treated to make it safe and healthy, the results of water quality monitoring, and other important information about water quality. The information is provided in compliance with requirements established by the U.S. Environmental Protection Agency (U.S. EPA) and the California Department of Health Services. EMID purchases all of its water from the San Francisco Public Utilities Commission (SFPUC).

The results provided of water quality monitoring by the SFPUC and EMID confirm that the water delivered to EMID customers met or exceeded all state and federal standards. The majority of the information contained herein comes from information provided by the SFPUC to EMID.

If there are any questions about the quality of the water, please call the SFPUC Water Quality Bureau toll free number at (877) SFPUCWQ or (877) 737-8297, or visit its web site at www.sfwater.org.

Any other questions about the water system should be directed to the Public Works Maintenance Department of the EMID at (650) 286-8140. City of Foster City/Estero Municipal Improvement District, 100 Lincoln Center Drive, Foster City, CA 94404.

Please call (650) 286-8140 if you would like a copy of the report sent to you.  Copies of the report are also available at City Hall.

Click the link below for more information on EMID's water quality:


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City Hall - 610 Foster City Blvd.
Foster City, CA 94404
(650) 286-3200