Water testing in San Francisco County, CA

Lowest listed local program price: Free, San Francisco Public Utilities Commission.

City water

SFPUC Free Follow-Up Water Quality Testing

Free

Bacteria
Nitrate
Copper
Iron
Chlorine
+4 more

Call 311 to report a home test kit result above a health-based standard; SFPUC will arrange follow-up sampling and measurement at the home tap and provide results at no cost.

Official page

Who can use it: San Francisco residents who can demonstrate, for example with a photo, that a home test kit produced a result above a health-based drinking water standard for a contaminant other than lead

Checked October 2, 2026. Report a change

See statewide tests and certified-lab lists for California.

What your results mean