Lead Water Testing Labs in Connecticut (16 state-certified labs)
Labs on Connecticut's official certification list that test drinking water for lead, with the ones that take homeowner samples first.
0 named for lead itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Connecticut but on its list.
USGS estimate for Connecticut.
How many labs test for lead in Connecticut
16 labs on Connecticut's official drinking-water lab list are certified to test for lead. Of these, 16 hold a group certification that includes it. 12 of them are marked as taking samples from the public. They are listed first.
The list is published by the Connecticut Department of Public Health - Environmental Laboratory Certification Program. List version on file: 10/09/2026. Fetched 2026-10-29 (UTC).
Connecticut labs certified for lead
Marked as taking public samples (12)
| Lab | Location | Lead certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| ALS Environmental - Newtown | Newtown, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Aquatek Labs, Inc. | Woodbridge, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Eastern Analytical Laboratory, Inc. | Old Saybrook, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Environmental Consulting Lab | Madison, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Environmental Monitoring Lab | Wallingford, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Envirotech Laboratory | Windsor, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Greenwich Health Department Laboratory | Greenwich, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Microbac Laboratories, INC. - Dayville | Dayville, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Northeast Laboratories, Inc | Rocky Hill, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Northwest Environmental Water Labs | Waterbury, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Regional Water Authority | New Haven, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
| Stamford Health Department Laboratory | Stamford, CT | Certified for a group that includes lead: confirm with the lab | Public samples: yes (per state) | Not on the list |
Other labs on the list (4)
| Lab | Location | Lead certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| ALS Environmental - Stratford | Stratford, CT | Certified for a group that includes lead: confirm with the lab | Not marked as taking public samples | Not on the list |
| Complete Environmental Testing, Inc. | Stratford, CT | Certified for a group that includes lead: confirm with the lab | Not marked as taking public samples | Not on the list |
| Phoenix Environmental Laboratories, Inc. | Manchester, CT | Certified for a group that includes lead: confirm with the lab | Not marked as taking public samples | Not on the list |
| South Norwalk Electric & Water Laboratory | Wilton, CT | Certified for a group that includes lead: confirm with the lab | Not marked as taking public samples | Not on the list |
How the Connecticut list marks public samples (whole list). Explicit 'Private Well Testing' column.
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 lead in Connecticut
On a private well, lead almost always comes from the metal the water touches on its way to your glass, and corrosive water decides how much. Read our lead explainer.
Connecticut guidance that mentions lead:
- Connecticut's health department guidance, as summarized by the state legislature's research office in 2019: basic indicators every year; lead at least once; arsenic, uranium and radon at least once and ideally every five years; VOCs at least once. [1]
- New wells: since October 1, 2022, the owner of every newly built private well must have it tested by a laboratory, including coliform, nitrate, nitrite, sodium, chloride, iron, manganese, hardness, turbidity, pH, sulfate, color, odor, arsenic and uranium (plus a first-draw lead sample if the well serves an existing building), and send the results to the local health authority. A new well may not be used for household purposes until the local health authority finds the results meet the state limits. [2]
About 861,472 people in Connecticut 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: Connecticut.
Other tests in Connecticut
- Connecticut General Assembly OLR Research Report 2019-R-0246, Private well testing (Oct 16, 2019)
- Connecticut General Statutes ยง 19a-37 (current, chapter 368a)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- CT DPH In-State Approved Commercial Laboratories Certified to Test Drinking Water (official list)
CT DPH In-State Approved Commercial Laboratories Certified to Test Drinking Water.
Official source