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Get your water tested in Connecticut.

The labs Connecticut certifies to test drinking water, from the state’s own list of July 2, 2026. A lab test is the only way to know what is in your own tap or well.

The short answer

Connecticut’s list has 86 labs certified to test drinking water: 20 in Connecticut and 66 in other states. The list says 14 take samples from homeowners.

Certification is test by test, so check that a lab is certified for what you want tested, and call first: it will say which bottles to use and how soon the sample has to arrive.

Labs in Connecticut

20 labs, by city.

Labs in Connecticut, certified by Connecticut
LabCityPhoneCertified forTakes homeowners’ samples
Microbac Laboratories, INC. - DayvilleDayville(860) 774-6814Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivityYes
CorrTech Corrosion LaboratoryDeep River(860) 526-2610Minerals and other inorganicsNot listed
Greenwich Health Department LaboratoryGreenwich(203) 622-7843Bacteria, nitrate, metals, minerals and other inorganics, radioactivityYes
Environmental Consulting LabMadison(203) 245-0568Bacteria, nitrate, metals, minerals and other inorganics, radioactivityYes
Phoenix Environmental Laboratories, Inc.Manchester(860) 645-1102Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivityNo
EMSL Analytical, Inc. - CTMeriden(203) 284-5948Bacteria, asbestosYes
Baron Analytical Laboratories LLCMilford(203) 874-5678Bacteria, nitrate, metals, minerals and other inorganics, disinfection byproductsNot listed
Regional Water AuthorityNew Haven(203) 401-2700Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFASYes
ALS Environmental - NewtownNewtown(203) 270-9973Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, radioactivityYes
Eastern Analytical Laboratory, Inc.Old Saybrook(860) 388-2378Bacteria, nitrate, metals, minerals and other inorganicsYes
Northeast Laboratories, IncRocky Hill(860) 828-9787 ext. 108BacteriaYes
Aquarion Water Trap Falls Water Quality LabShelton(203) 445-7362BacteriaNot listed
Stamford Health Department LaboratoryStamford(203) 977-4378Bacteria, nitrate, minerals and other inorganicsYes
ALS Environmental - StratfordStratford(203) 325-1371Nitrate, metals, minerals and other inorganics, organic chemicals, radioactivityNo
Complete Environmental Testing, Inc.Stratford(203) 377-9984Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivityNo
Environmental Monitoring LabWallingford(203) 284-0555Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproductsYes
Northwest Environmental Water LabsWaterbury(203) 437-4110Bacteria, nitrate, metals, minerals and other inorganicsYes
South Norwalk Electric & Water LaboratoryWilton(203) 866-3366 ext. 259Bacteria, nitrate, minerals and other inorganicsYes
Envirotech LaboratoryWindsor(860) 688-7249Bacteria, nitrate, metals, minerals and other inorganics, radioactivityYes
Aquatek Labs, Inc.Woodbridge(203) 389-1824Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, radioactivityYes

Labs in other states

66 labs Connecticut certifies outside the state, by state and city. Ask whether a lab takes samples by mail, and how fast they have to arrive.

Labs in other states, certified by Connecticut
LabCityPhoneCertified for
Eurofins PomonaPomona, CA(626) 386-1100Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Continental Water LaboratorySacramento, CA(916) 379-2323Bacteria
Batta Laboratories, LLCNewark, DE(302) 737-3376Asbestos
SGS North America, Inc. - OrlandoOrlando, FL(407) 425-6700 ext. 14904Organic chemicals, PFAS
PACE Analytical Services, LLC - Ormond Beach FLOrmond Beach, FL(386) 672-5668Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
PathCon LaboratoriesPeachtree Corners, GA(770) 446-0540Bacteria
Nalco Water, an Ecolab CompanyNaperville, IL(331) 237-2543Bacteria
Eurofins EatonSouth Bend, IN(574) 233-4777Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Eurofins South BendSouth Bend, IN(574) 472-5515Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Vallid Laboratories, Inc.Agawam, MA(413) 789-2206Bacteria
Pace Analytical Services, LLC - East LongmeadowEast Longmeadow, MA(413) 525-2332Bacteria, nitrate, minerals and other inorganics, organic chemicals, PFAS
Pace Analytical Services, LLC - Mansfield, MA (320 Forbes)Mansfield, MA(508) 898-9220Metals, minerals and other inorganics, organic chemicals, PFAS
AccuStar LabsWard Hill, MA(978) 521-0901Radioactivity
Pace Analytical Services, LLC - Westborough, MAWestborough, MA(508) 898-9220Nitrate, minerals and other inorganics, organic chemicals
AMA Analytical ServicesLanham, MD(301) 459-2640Metals, asbestos
Nova Analytic LabPortland, ME(207) 804-7327PFAS
Katahdin Analytical ServicesScarborough, ME(207) 874-2400Nitrate, metals, minerals and other inorganics, organic chemicals
NELAnalyticalWinslow, ME(207) 873-7711 ext. 302Bacteria, nitrate, metals, minerals and other inorganics
NSF InternationalAnn Arbor, MI(734) 827-6851Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
ALS Environmental-HollandHolland, MI(616) 399-6070PFAS
Accurate Analytical Testing, LLCRomulus, MI(734) 629-8161Metals
National Testing Laboratories, Ltd.Ypsilanti, MI(734) 483-8333Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
PACE Analytical Services, LLC-Minneapolis MNMinneapolis, MN(612) 607-1700Metals, organic chemicals
Eurofins - St. LouisEarth City, MO(314) 298-8566Metals, radioactivity
Eurofins Built Environmental Testing EastCary, NC(919) 481-1413Asbestos
Scientific Analytical Institute, Inc.Greensboro, NC(336) 292-3888Asbestos
SGS North America, Inc.Wilmington, NC(910) 667-0134PFAS
Eurofins ConcordConcord, NH(603) 228-0525Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Eurofins Built Environment Testing EastCherry Hill, NJ(856) 231-9449Bacteria, metals, asbestos
EMSL Analytical, Inc.- NJCinnaminson, NJ(800) 220-3675 ext. 2545Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity, asbestos
SGS North America, Inc. - DaytonDayton, NJ(732) 329-0200 ext. 1226Nitrate, metals, minerals and other inorganics, organic chemicals, PFAS
Eurofins EdisonEdison, NJ(732) 549-3900Nitrate, metals, minerals and other inorganics, organic chemicals
Hampton-Clarke, Inc.Fairfield, NJ(973) 244-9770Metals
Pace Analytical Services - FairfieldFairfield, NJ(973) 227-0422Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
Alliance Technical Group, LLC - NewarkMountainside, NJ(908) 789-8900Metals, organic chemicals
Pace Analytical Services-PennsaukenPennsauken, NJ(856) 486-1177Bacteria
ALS Environmental - Toms RiverToms River, NJ(203) 325-1371PFAS
Hillmann Consulting, LLCUnion, NJ(908) 688-7800Bacteria
Adirondack Environmental Services, Inc.Albany, NY(518) 434-4546Nitrate, metals, minerals and other inorganics, asbestos
EMSL Analytical, Inc.-Carle PlaceCarle Place, NY(516) 997-7251Bacteria, metals, asbestos
Eastern Analytical Services - NYElmsford, NY(914) 592-8380Metals, asbestos
Radon Testing Corp of AmericaElmsford, NY(914) 345-3380Radioactivity
AG Environmental RSC, LLCFerndale, NY(845) 704-8151Bacteria, nitrate, metals, minerals and other inorganics
EMSL Analytical, Inc.- Long Island, NYLong Island City, NY(212) 290-0051Asbestos
PACE Analytical Services, LLC - MelvilleMelville, NY(516) 370-6000Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
America Science TEAM NY, Inc.New York, NY(212) 679-8600Asbestos
Pace Analytical Services LLC-NewburghNewburgh, NY(845) 562-0890 ext. 803Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
ALS Environmental - QueensRichmond Hill, NY(203) 357-0166PFAS
ALS Environmental-RochesterRochester, NY(585) 288-5380Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Alliance Technical Group, LLC-AkronCuyahoga Falls, OH(330) 253-8211Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Microbac Laboratories, Inc. - Marietta DivisionMarietta, OH(740) 373-4071 ext. 4189Nitrate, metals, minerals and other inorganics, PFAS
Blue Triton Brands Inc.Breinigsville, PA(484) 866-4338Bacteria
PACE Analytical Services, LLC - GreensburgGreensburg, PA(724) 850-5630Radioactivity
Eurofins Lancaster Labs Environment TestingLancaster, PA(717) 656-2300 ext. 1812Nitrate, metals, minerals and other inorganics, organic chemicals, PFAS
ALS Environmental-MiddletownMiddletown, PA(717) 944-5541Organic chemicals, disinfection byproducts
Special Pathogens Laboratory, a Pace LaboratoryPittsburgh, PA(412) 281-5335Bacteria
Eurofins Rhode IslandNorth Kingstown, RI(413) 340-3947Nitrate, metals, minerals and other inorganics
RI Analytical Laboratories, Inc.Warwick, RI(401) 737-8500 ext. 142Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
New England Testing Laboratory, Inc.West Warwick, RI(401) 353-3420Bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
GEL Laboratories, LLCCharleston, SC(843) 556-8171Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Eurofins TestAmerica - KnoxvilleKnoxville, TN(865) 291-3000Organic chemicals
Pace Analytical National CTR for Testing & InnovMt. Juliet, TN(615) 758-5858Nitrate, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
AmeriSci RichmondMidlothian, VA(804) 763-1200Asbestos
Environmental Hazards Services, LLCNorth Chesterfield, VA(804) 275-4788Metals
Schneider Laboratories Global, Inc.Richmond, VA(804) 353-6778Nitrate, metals, minerals and other inorganics
Analytical Services, Inc. (VT)Williston, VT(800) 723-4432 ext. 15Bacteria

What to ask a lab to test

Source: Connecticut DPH, approved commercial laboratories certified to test drinking water, dated July 2, 2026, read Oct. 10, 2026. Labs are listed as the state lists them; what each is certified for is as far as the list says. Certifications change, so a lab’s own word is the latest.

A lab named for a water utility is listed apart. Distances on town pages are straight lines between ZIP code centers from the Census 2020 gazetteer. How labs are listed here.

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