Arsenic Water Testing Labs in Rhode Island (4 state-certified labs)
Labs on Rhode Island's official certification list that test drinking water for arsenic, with the ones that take homeowner samples first.
4 named for arsenic itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Rhode Island but on its list.
USGS estimate for Rhode Island.
How many labs test for arsenic in Rhode Island
4 labs on Rhode Island's official drinking-water lab list are certified to test for arsenic. All 4 are named for arsenic on the list. 4 of them are marked as taking samples from the public. They are listed first.
The list is published by the Rhode Island Department of Health (RIDOH) - Center for Drinking Water Quality and State Health Laboratories, laboratory certification. List versions on file: page as fetched 2026-11-07 (no date printed); certificate appendix issued 1/21/2026; page as fetched 2026-11-07 (no date printed); certificate appendix issued 3/12/2026; page as fetched 2026-11-07 (no date printed); certificate appendix issued 3/24/2026. Fetched 2026-11-07 (UTC).
Rhode Island labs certified for arsenic
Marked as taking public samples (4)
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Eurofins North Kingstown | North Kingstown, RI | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| New England Testing Laboratory | West Warwick, RI | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Rhode Island Analytical Laboratories | Warwick, RI | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Rhode Island Department of Health, State Health Lab | Providence, RI | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
How the Rhode Island list marks public samples (whole list). Yes for the labs on RIDOH's 'Certified Drinking Water Testing Labs' page, which says they "provide analytical services for a fee to individuals and public water systems". Not stated for the other out-of-state labs.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for arsenic in Rhode Island
Arsenic is invisible, tasteless and mostly natural, and it comes in two forms that respond very differently to treatment. Read our arsenic explainer.
Rhode Island guidance that mentions arsenic:
- In some areas of Rhode Island, RIDOH says it may be a good idea to test for arsenic, beryllium and/or PFAS. Its online map tool shows whether your home is in an area where these special tests are recommended. [1]
USGS estimates that the most private-well users with arsenic above 10 µg/L, EPA's limit for public water, live in Providence County, Washington County and Newport County (about 571 people in Providence County, 2010 base year). USGS describes this kind of estimate as useful "for broad screening of the population at risk", so it says nothing certain about any one well. [2]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Providence County | 571 people (2010 base year) | |
| Washington County | 535 people (2010 base year) | |
| Newport County | 267 people (2010 base year) | |
| Kent County | 133 people (2010 base year) | |
| Bristol County | 3 people (2010 base year) |
USGS model estimate for broad screening, not a measurement of any well. Only a test tells you about your own well. Source: USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017), accessed 2026-11-01.
About 112,853 people in Rhode Island used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [3] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Rhode Island.
Other tests in Rhode Island
- Rhode Island Department of Health, Testing Your Well Water (last updated October 22, 2026)
- USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- RIDOH - Certified Drinking Water Testing Labs / RIDOH - Appendix to Analytical Laboratory Certificate LAI00033 (official list)
- RIDOH - Certified Drinking Water Testing Labs / RIDOH - Appendix to Analytical Laboratory Certificate LAI00351 (official list)
- RIDOH - Certified Drinking Water Testing Labs / RIDOH - Appendix to Analytical Laboratory Certificate LAI00368 (official list)
- RIDOH - Certified Drinking Water Testing Labs / RIDOH - Appendix to Analytical Laboratory Certificate LAI00389 (official list)
RIDOH - Certified Drinking Water Testing Labs / RIDOH - Appendix to Analytical Laboratory Certificate LAI00368.
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