Water Testing

Only water collected in a bottle provided by the lab will be tested. Bottles are available for pick up in the lobby at 3313 Chanate Road in Santa Rosa. We do not test for chemicals, metals, minerals, or Giardia.

Water specimens must be dropped off in person Monday-Thursday 8am-4pm. Samples are not accepted on Fridays, Saturdays, Sundays, holidays, or the day before a holiday.

Fill out a test requisition form for each sample (link below).

Fees may be paid by cash, check or by most credit cards.

Results will be ready in approximately 24 hours.

Download Sample Collection Instructions

Water Lab 17: Drinking Water Specimen Collection & Transport Instructions with Rejection Criteria (PDF: 387 kB)

Colilert: Presence/Absence

For routine well water testing.
For the simultaneous detection and confirmation of total coliforms and E. coli.

Colilert: Quantitray

For well water testing requiring a Most Probable Number.
For the simultaneous detection, confirmation and enumeration of total coliforms and E. coli.