Certified labs by state
Rhode Island
RIDOH says an estimated 120,000 Rhode Islanders rely on private water systems. Rhode Island also has a RIDOH Special Testing Map Tool so residents can check whether arsenic, beryllium, or PFAS testing is recommended at their address.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- Certifies drinking water labs
- Rhode Island Department of Health (RIDOH)
- Official certified lab list
- Official page →
Official resources in Rhode Island
RIDOH’s main homeowner page for what to test, how often to test, and when extra testing is recommended.
Official list of Rhode Island and nearby laboratories certified by RIDOH to test drinking water.
Explains the state private well program and links to homeowner testing instructions and related resources.
Address lookup map for Rhode Island areas where special private-well tests are recommended.
URI Cooperative Extension page with Rhode Island-specific explanations of routine and additional well-water tests.
Key facts for Rhode Island
- RIDOH recommends annual tests for coliform bacteria, nitrate/nitrite, color, chloride, sodium, and turbidity.
- RIDOH recommends testing metals, corrosivity, and hardness every three to five years.
- RIDOH recommends testing volatile organic compounds and MTBE every five to 10 years.
- Some Rhode Island areas may need special testing for arsenic, beryllium, and PFAS.
- Rhode Island law requires private-well homes to have water tested before sale or transfer.
- URI says radon in water can contribute to indoor-air radon, the greater concern.
What to do next
- Start with RIDOH’s testing schedule, then use the RIDOH Special Testing Map Tool to see whether your address needs arsenic, beryllium, or PFAS testing.
- Use only a RIDOH-certified laboratory from the official list; avoid over-the-counter or mail-in kits that do not use a certified lab.
- If you notice a change in taste, smell, or color, or your well was flooded or damaged, test sooner than the routine schedule.
Helpful guides
- How to choose a state-certified drinking water lab
- What to test your private well water for (and how often)
- How to collect a well water sample without ruining the test
- How to read a water test report: MCLs, units and flags