AE
ALS Environmental - Newtown
Newtown, CT
Water testing labs in Fairfield County, CT
6 state-accredited water testing labs in Fairfield County, CT.
6 certified labsUpdated October 2026Source: state lab accreditation records
Source: Connecticut DPH list of in-state labs certified to test drinking water, list dated Jul 2, 2026. Find a Water Test is independent and not affiliated with the Connecticut Department of Public Health. Certification covers specific tests, so confirm the lab is certified for the ones you need:.
6 certified labs near Fairfield County, CT
AE
ALS Environmental - Stratford
Stratford, CT
CE
Complete Environmental Testing, Inc.
Stratford, CT
GH
Greenwich Health Department Laboratory
Greenwich, CT
Public water system lab. Many don't accept private well samples, so call first.
SN
South Norwalk Electric & Water Laboratory
Wilton, CT
Public water system lab. Many don't accept private well samples, so call first.
SH
Stamford Health Department Laboratory
Stamford, CT
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Fairfield County, CT
How mail-in testing worksNT
National Testing Laboratories (WaterCheck)
Ships nationwide
Single tests from $75; well and city packages $165 to $440
Certified in Connecticut
TS
Tap Score by SimpleLab
Ships nationwide
Single-contaminant kits from about $145; full well and city panels about $300 to $870
Testing service: sends your sample to a partner lab.
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Well water guides
Common questions
Where can I test well water near Fairfield County, CT?
The state-accredited labs above serve Fairfield County, CT. Many offer sample bottles you collect at home.
What should I test for near Fairfield County, CT?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.