Learn more about San Mateo County Health.
The Health Executive Council includes San Mateo County Health’s chief, deputy chief, health officer and other division and team leaders.
Stay informed on upcoming events from San Mateo County Health.
Learn how San Mateo County Health’s Health Coverage Unit can help you apply for Medi-Cal, get enrollment assistance and find low-cost health care options.
Find key phone numbers, department contacts and media inquiries at San Mateo County Health.
Find health services, programs and resources we offer. Get connected to care, support and information that can help you and your family stay healthy.
Through our divisions’ work, we protect San Mateo County by reducing environmental health risks, preventing disease, and promoting the physical and mental well-being of our entire community.
Protection, support and advocacy for older adults and persons with disabilities.
Regulatory oversight of public and private emergency medical services.
Protects the health of everyone in San Mateo County.
Provides mental health and substance use services.
Environmental Health Services is the local authority on environmental health and safety policy and enforcement.
Provides integrated medical, dental, mental health and chemical dependency treatment to the incarcerated adult population.
Focuses on early intervention with San Mateo County parents and children who are low-income and have faced health inequities
We are a public hospital and clinic system that serves all San Mateo County residents by providing accessible, high-quality care with a focus on prevention and community partnership.
Get more information about how to create or log in to your MyChart.
We offer comprehensive preventative care, diagnostics and treatment for adults.
We provide comprehensive care for women's reproductive, hormonal and general health across all life stages.
We have expertise in specialized medical care.
We provide care for teeth and gum conditions.
We provide other services including rehabilitation, lab, imaging and therapy.
Available 24/7, we provide Immediate medical care for urgent, life-threatening conditions and injuries.
We provide full hospital care and comfort, including pain and symptom relief for serious illnesses.
San Mateo County Health partners with community members through boards, commissions and initiatives that guide programs, shape policies and promote equity
Environmental Health Services
The State Water Board (Drinking Water Division) oversees large water systems that provide drinking water for most of the public.
This includes water systems that serve 15 or more service connections or 25 people daily for at least 60 days out of the year.
San Mateo County Environmental Health regulates smaller systems under the State Small Water Systems Program. A State Small Water System is a system that serves water to five to 14 service connections and fewer than 25 people daily for at least 60 days out of a year. These systems are usually found in rural areas. Environmental Health ensures that State Small Water Systems provide safe drinking water in adequate supply and under adequate pressure.
Environmental Health staff enforce the California Safe Drinking Water Act (SDWA), which regulates water quality, maintenance and systems design. They perform the following functions:
If you are concerned about the quality of your water, your local supplier is required by law to give you information at your request.
If you are not satisfied after reviewing water company data, you can hire a local state certified laboratory to analyze your tap water. The lab will give you sample containers and collection procedures. You can test for bacteria, iron, lead and copper or other contaminants. For a complete list of certified laboratories, please visit the State Water Resources Control Board, Division of Drinking Water.
Environmental Health does not routinely sample individual residents’ water supply.
If sediment is coming out of your hot water line, it is probably caused by rust in your water heater or your plumbing. It is not dangerous to your health. You can correct it by flushing or repairing your water heater or pipes.
If sediment is coming out of your cold water line, it is probably caused by rust in the distribution mains in the street. It can happen when water mains are shaken due to earthquakes or when heavy equipment is used near the mains. The fire department can also cause sediment to break loose by opening hydrants, causing the mains to shake. It is not a health hazard. The sediment should gradually dissipate and disappear.
Not likely. Outbreaks of waterborne disease are very rare. Public water systems must routinely test their water quality. If there are signs of contamination, the system is required by law to notify the public immediately.
If you become ill and you don’t know why, contact your physician. Your doctor is required to report certain illnesses to the Health Department. Environmental Health can investigate water systems and put emergency safety procedures into effect if necessary.
Cascade Ranch Water System – Pescadero, CA
Dearborn Spring Water System – Pescadero, CA 94060
Djerassi Resident Artists Program Water System – Woodside, CA 94062
Echo Valley Water Coop – Loma Mar, CA
Jacobs Farm/Del Cabo- Pescadero, CA
La Honda Properties – La Honda, CA
La Honda Vista Water Company – La Honda, CA
Ano Nuevo Ranch – Pescadero, CA
Westland Nursery #2 – Pescadero, CA