The Estero Municipal Improvement District waste water collection program maintains the sanitary sewer collection and pumping system within Foster City. Sewage is treated at the San Mateo Regional Water Quality Control Plant located in San Mateo.

Please notify the sewer department of any blockages or odor problems related to the City's sewer system by calling (650) 286-8140, or e-mail at maintenance@fostercity.org.

If you have any questions regarding your sewer service or billing please call the Foster City Finance Department.