Certified Lab Directory
Certified Water Testing Labs in Vermont
If you're on a private well in Vermont — or you just don't trust what's coming out of the tap — the right move is a certified lab. The 6 labs below are the ones based in Vermont that hold current drinking water certified status from the Vermont Department of Health Laboratory, meaning they use EPA-approved test methods and get audited to prove it. No one pays to be on this list. It comes straight from the state's official records, cited at the bottom of the page.
Certified drinking water labs in Vermont
Vermont's list has no column for this. It highlights the qualifying laboratories in green and explains the color in its own words: "Laboratories highlighted in green accept private samples." 1 of the 6 laboratories below is not highlighted; 5 are. The Health Department also warns that a lab which generally accepts private samples may still decline private PFAS samples or run them by a noncertified method, so name the test you need when you call.
| Lab | City | Phone | Accepts Private Samples |
|---|---|---|---|
| Vermont Dept. of Health Laboratory | Colchester | (800) 660-9997 | Yes |
| Vermont Agriculture and Environmental Laboratory | Randolph Center | 802-585-6073 | Yes |
| City of Rutland Water Laboratory | Rutland | (802) 773-1863 | Yes |
| Champlain Water District | South Burlington | (802) 861-4896 | No |
| Analytical Services, Inc. | Williston | (802) 878-5138 | Yes |
| Endyne, Inc. | Williston | (802) 879-4333 | Yes |
Certification status changes — labs are added, dropped, and suspended throughout the year. Before you mail a sample, confirm the lab still holds certification for the specific test you need. This list was pulled from the official source on .
This table covers the 6 certified labs located in Vermont. The Vermont Department of Health Laboratory also certifies 40 labs based outside the state, which can often still run your sample — those are on the official list linked below.
Source: Vermont Department of Health Laboratory, Drinking Water Laboratory Certification (Laboratories Certified for Drinking Water Analysis) (PDF). List dated June 11, 2026; retrieved . (https://www.healthvermont.gov/sites/default/files/document/lsid-phl-DW-certified-laboratory-list.pdf)
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Get the Free Test KitHow lab certification works in Vermont
In Vermont, drinking water laboratories are certified by the Vermont Department of Health Laboratory under the Drinking Water Laboratory Certification (Laboratories Certified for Drinking Water Analysis). The program operates within the EPA's national framework for drinking water lab certification: labs must use EPA-approved analytical methods, successfully analyze proficiency-test samples at least annually for each certified method and analyte, and pass periodic on-site audits (EPA, epa.gov/dwlabcert). Certification is issued per method and per analyte — so a lab certified for bacteria testing isn't automatically certified for metals or radiochemistry. When you call, name the specific test you need.
Common questions about Vermont water testing labs
Who certifies water testing labs in Vermont?
The Vermont Department of Health Laboratory, through the Drinking Water Laboratory Certification (Laboratories Certified for Drinking Water Analysis). The program follows the EPA's national framework for drinking water laboratory certification, which requires EPA-approved test methods, at least annual proficiency testing, and periodic on-site audits. Source: Vermont Department of Health Laboratory (https://www.healthvermont.gov/sites/default/files/document/lsid-phl-DW-certified-laboratory-list.pdf) and EPA (epa.gov/dwlabcert).
How many certified labs are in Vermont?
6 certified drinking water labs are located in Vermont, as of the official list we pulled on August 2, 2026. The Vermont Department of Health Laboratory also certifies 40 labs based outside Vermont that can often still analyze your sample; those appear on the official list linked on this page. Certification changes throughout the year, so treat this as a starting point and confirm status with the lab. Source: Vermont Department of Health Laboratory (https://www.healthvermont.gov/sites/default/files/document/lsid-phl-DW-certified-laboratory-list.pdf).
How often should I test my well water in Vermont?
The EPA recommends testing private wells annually for total coliform bacteria, nitrates, total dissolved solids, and pH — and testing immediately after flooding, well repairs, nearby construction, or any change in your water's taste, odor, or color. Your local health department can tell you which contaminants are common in Vermont groundwater. Source: EPA, Protect Your Home's Water (epa.gov/privatewells).
Can I use a lab that isn't on this list?
This list covers labs located in Vermont that were on the official list published by the Vermont Department of Health Laboratory as of August 2, 2026. Certification changes during the year, so a lab missing from this page may have been certified since then — the official source linked above always has the current list and it also includes certified labs based outside the state. What we'd avoid is any lab that can't show a current drinking water certification at all. The EPA's guidance is to only use certified laboratories for drinking water testing. Source: EPA, Protect Your Home's Water (epa.gov/privatewells).
What if the nearest certified lab is far from me?
Ask the lab about a mail-in collection kit — many certified labs ship one with instructions and pre-treated bottles. Timing matters for some tests (bacteria samples have a short window between collection and analysis), so follow the lab's collection instructions exactly. Your local health department is also worth a call; some offer private well testing for free. Source on health department testing: EPA, Protect Your Home's Water (epa.gov/privatewells).
Lab results came back with a problem?
High hardness, high TDS, or a contaminant above EPA limits can usually be treated at the house. Send us what the lab found and we'll build a filtration estimate around your report.
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