Water testing in Sonoma County, CA
Lowest listed local program price: $39, other prices posted, County of Sonoma, Department of Health Services, Public Health Regional Laboratory.
Sonoma County Public Health Regional Laboratory Well Water Testing
$39, other prices posted
- Bacteria
- E. coli
Pick up an approved sample bottle and requisition form at 3313 Chanate Road in Santa Rosa, collect the sample, and drop it off Monday through Thursday, 8 a.m. to 4 p.m.
All posted prices
$39.00 for Colilert Presence/Absence (P/A); $52.53 for Colilert Quantitray
Who can use it: Open to the public; only water collected in a bottle provided by the lab will be tested; the lab does not test for chemicals, metals, minerals, or Giardia.
- Public Health Regional Laboratory, 3313 Chanate Road, Santa Rosa · 707-565-4711
Checked October 1, 2026. Report a change