Water testing in Santa Clara County, CA
Lowest listed local program price: Free, Santa Clara Valley Water District (Valley Water).
Valley Water Free Testing for Domestic Well Owners
Free
- Nitrate
- Bacteria
- Hardness
- Conductivity
- Fluoride
- +4 more
Call Valley Water's Groundwater Hotline at (408) 630-2300 to confirm your well is eligible. Staff then schedule a visit, collect an untreated sample from an accessible outdoor hose bib (under 30 minutes), after you sign a right-of-entry agreement, and mail lab results in about three weeks.
Who can use it: Domestic well owners in Santa Clara County whose well sits within Valley Water groundwater benefit zones W-2, W-5, W-7 or W-8; call the Groundwater Hotline to confirm eligibility
Checked October 2, 2026. Report a change