Find a Water Test Add or claim a listing

State-certified water testing labs in Massachusetts

12 state-accredited labs for drinking and well water testing in Massachusetts.

1 cities & counties12 certified labs

Source: MassDEP list of certified drinking water labs that accept home owner samples, list dated Oct 28, 2026. Find a Water Test is independent and not affiliated with the Massachusetts Department of Environmental Protection. Certification covers specific tests, so confirm the lab is certified for the ones you need: Verify a certification or call MassDEP lab certification at (978) 682-5237.

Counties in Massachusetts A–Z

Smaller counties in Massachusetts

Counties with only a few listings so far, grouped by county.

Barnstable County 1

Bristol County 1

Dukes County 1

Hampden County 1

Hampshire County 1

Middlesex County 1

Plymouth County 1

Suffolk County 1

Worcester County 1

Mail-in labs that ship to Massachusetts

How mail-in testing works

Bad result? Get help from water treatment pros near Massachusetts

Tell us what your test found and we'll connect you with up to three local water treatment companies.

What happens next

  1. We match your ZIP to water treatment companies nearby.
  2. They contact you directly to talk through your results.
  3. Compare options and pick one, or none. No fee, no obligation.

Free, no obligation. We don't sell your details to anyone else.

Just need a lab? Every certified lab is listed above with directions.