Certified Drinking Water Testing Labs

The list below represents labs in Rhode Island and the surrounding area that are certified by the Rhode Island Department of Health (RIDOH) to test drinking water. These labs provide analytical services for a fee to individuals and public water systems in need of testing. RIDOH does not endorse or recommend any of the certified laboratories below.


North Kingstown



West Warwick

Nearby Out-of-state Laboratories (click for full list)

If you represent a lab certified by RIDOH to test drinking water that is located in Rhode Island or the surrounding area and would like to have the lab added to the list below, please call the Center for Drinking Water Quality at 401-222-6867.

What you should know

It is unlawful to test drinking water without certification. Recently, companies, including prominent big-box retailers, have offered "free" testing in exchange for a sales pitch for expensive and often unnecessary treatment systems. Remember to have your water tested by an independent, certified laboratory before making any decision about treatment. Only a certified testing laboratory can provide an objective analysis of your drinking water. Private well owners can read more about testing their water on the Private Wells webpages.