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Sewer

The City of Half Moon Bay provides sewer collection service south of Frenchman’s Creek to Miramontes Point Road.  Waste water from residences, businesses, schools, restaurants and other buildings is conveyed through sewer mains owned by the City of Half Moon Bay or the Granada Sanitary District to the sewer treatment plant operated by Sewer Authority Mid-Coastside (SAM). www.samcleanswater.org. 

  • The Granada Sanitary District www.granada.ca.gov provides sewer collection service from Frenchman’s Creek north to Mirada Road.
  • For a breakdown of the Sewer Service Charges click here:
    icon Sewer Service Charge

    Sewer Backups

    In case of a sewer backup, please call SAM at 650-726-0124.  SAM maintenance crew responds to sewer service calls seven days a week/24 hours a day (24-7).  The crew will determine whether the sewer problem is in the sewer system owned by the property owner, City of Half Moon Bay or Granada Sanitary District. If the stoppage is the responsibility of the resident/property owner, you will be instructed to call a plumber.
  • To find out more on how to avoid sewer problems please click here


Sewage System – Definitions

The Municipal Code, Chapter 13.12 Sewage System - Definitions has been amended as follows:

Section 13.12.040 “Building sewer” is hereby amended to read as follows:

13.12.40  Building sewer.
“Building sewer” means that portion of any sewer beginning at the plumbing or drainage outlet of any building or industrial facility and running to the property line or to a private sewage disposal system.  The building sewer is owned by the owner of the property it serves, and said owner is responsible for all maintenance, repairs and replacement thereof.

Section 13.12.110 “Lateral sewer” is hereby amended to read as follows:

13.12.110  Lateral sewer
“Lateral sewer” means the portion of a sewer located within a public street connecting a building sewer to the main sewer, the ownership, and responsibility for all maintenance, repairs and replacement of which lies with the owner of the property it serves.

Section 13.12.120 “Main sewer is hereby amended to read as follows:

13.12.120  Main sewer
“Main Sewer” means a City-owned and maintained sewer located within a public street or easement and designed to accommodate more than one lateral sewer.


Hazardous Waste


Many consumer products are considered household waste.  Never pour items like these into a sink or toilet:  Motor Oil, Weed Killer, Lighter Fluid, Paint, Insecticides, Gasoline, Wood Preservatives, Antifreeze, read product labels for disposal information.

For more information about household hazardous waste disposal, call the San Mateo County Household Hazardous Waste Program at 650-363-4718 or www.smhealth.org/hhw