Certified Water Labs

Private Well Water Testing in Suffolk County

Private well owner running a routine or first-time test for common contaminants (coliform bacteria, nitrate, arsenic) and needing a certified lab that fits their region and well.

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Questions to ask
Next steps

When to contact private well water testing

Contact private well water testing when you need local process, feasibility, and next-step guidance before relying on a decision.

Questions to ask before hiring

Which contaminants should I test for based on my region and well depth?
Is the lab certified for the specific analytes (coliform bacteria, nitrate, arsenic)?
How should I collect and transport the sample to keep it valid?
How often should I retest?

Source-backed Private Well Water Testing listings

Source-backed

Suffolk County Water Authority Laboratory

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Suffolk County Water Authority Laboratory (ELAP ID 10311) as a Potable Water certified laboratory at 260 Motor Parkway, Hauppauge, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 631-563-0259

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Source-backed

Certified Laboratories LLC

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Certified Laboratories LLC (ELAP ID 10338) as a Potable Water certified laboratory at 65 Marcus Drive, Melville, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 516-576-1400

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Source-backed

Pace Analytical Services, LLC - Melville, NY

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Pace Analytical Services, LLC - Melville, NY (ELAP ID 10478) as a Potable Water certified laboratory at 575 Broad Hollow Road, Melville, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 516-370-6000

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Source-backed

Suffolk Co Public Env Health Lab

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Suffolk Co Public Env Health Lab (ELAP ID 10528) as a Potable Water certified laboratory at Bldg 487, N County Complex 725 Veterans Highway, Hauppauge, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 631-853-5528

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Source-backed

Enviroscience Consultants, LLC

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Enviroscience Consultants, LLC (ELAP ID 11681) as a Potable Water certified laboratory at 2150 Smithtown Avenue Suite 3, Ronkonkoma, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 631-580-3191

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Source-backed

Long Island Analytical Laboratories, INC

Well Water Testing

New York State ELAP (Environmental Laboratory Approval Program, Wadsworth Center) registry lists Long Island Analytical Laboratories, INC (ELAP ID 11693) as a Potable Water certified laboratory at 110 Colin Drive, Holbrook, in Suffolk County. This directory has not independently verified current certification scope, whether the lab accepts private-well or consumer samples, pricing, turnaround, reviews, or suitability for any mortgage (FHA/VA/USDA) or PFAS/lead analyte-specific testing requirement.

Call 631-472-3400

Service area New YorkSuffolk County

No reviews collected
Facts limited to cited public sources
Provider approval is not implied
Use the hiring checklist before contacting

View profile Hiring checklist

Buyer guides for private well water testing

How to verify a New York water lab's ELAP certification for the exact test you need
New York's ELAP certification is issued per specific category, analyte, and method — not as one blanket approval. Here is how to use the state's free public search tool to confirm a lab is currently certified for your test before you schedule it.
Selling a well home in Westchester, Suffolk, or Rockland County, NY? The county well-water test law (and why a mail-in kit won't satisfy it)
Westchester, Suffolk, and Rockland Counties each require a private-well water test before a home sale closes — and in each one, a self-collected or mail-in kit sample does not satisfy the law. Here is who tests, who pays, and what the sample-collection rule actually requires.

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What happens next: we route your request to relevant providers for review.
We do not verify provider licenses, prices, or reviews yet.
Expect providers to follow up directly; nothing is booked automatically.

Certified Water Labs is an independent directory. We do not certify, accredit, endorse, or perform water testing. Laboratory certification is issued by state programs under EPA oversight; always verify a lab's current certification and your required test panel directly with the lab and your state program or lender before scheduling. Content is general information, not legal, financial, or health advice.

Frequently asked questions

Are these Private Well Water Testing in Suffolk County listings source-backed?

Only providers with source-backed public records are shown. Invalid and unverified provider rows are excluded from public listing pages.

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What should buyers verify independently?

Verify credentials, current availability, scope, and pricing directly with the provider and the official sources linked on each listing. This site never invents those details.

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