17 named for PFAS itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Maryland but on its list.
USGS estimate for Maryland.
How many labs test for PFAS in Maryland
17 labs on Maryland's official drinking-water lab list are certified to test for PFAS. All 17 are named for PFAS on the list. The Maryland list does not say which labs take samples from homeowners, so call a lab before you send one. 16 are located outside Maryland.
The list is published by the Maryland Department of the Environment (MDE) - Water Supply Program, Laboratory Certification Program. List version on file: Latest Revisions: 10/1/2026; PFAS list Last Rev 101/2026. Fetched 2026-11-07 (UTC).
Maryland labs certified for PFAS
| Lab | Location | PFAS certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| ALLIANCE TECHNICAL GROUP - AKRON | Cuyahoga Falls, OH | Named on the official list | Public samples: ask the lab | Not on the list |
| ALS ENVIRONMENTAL - MIDDLETOWN | Middletown, PA | Named on the official list | Public samples: ask the lab | Not on the list |
| ALS ENVIRONMENTAL- TOMS RIVER | Toms River, NJ | Named on the official list | Public samples: ask the lab | Not on the list |
| AMERICAN WATER LABORATORY - BELLEVILLE | Belleville, IL | Named on the official list | Public samples: ask the lab | Not on the list |
| CRITERION LABORATORIES, INC. | Bensalem, PA | Named on the official list | Public samples: ask the lab | Not on the list |
| EMSL ANALYTICAL, INC - CINNAMINSON | Cinnaminson, NJ | Named on the official list | Public samples: ask the lab | Not on the list |
| EUROFINS LANCASTER LABORATORIES ENVIRONMENT TESTING, LLC | Lancaster, PA | Named on the official list | Public samples: ask the lab | Not on the list |
| EUROFINS POMONA (formerly Eurofins Eaton Analytical-Monrovia) | Pomona, CA | Named on the official list | Public samples: ask the lab | Not on the list |
| EUROFINS SOUTH BEND (formerly Eurofins Eaton Analytical, LLC-South Bend) | South Bend, IN | Named on the official list | Public samples: ask the lab | Not on the list |
| KATAHDIN ANALYTICAL SERVICES, LLC | Scarborough, ME | Named on the official list | Public samples: ask the lab | Not on the list |
| ONTERRIS LABORATORIES, LLC- Wilmington (formerly ENTHALPY ANALYTICAL, LLC- Wilmington) | Wilmington, NC | Named on the official list | Public samples: ask the lab | Not on the list |
| PACE ANALYTICAL SERVICES, LLC - MANSFIELD | Mansfield, MA | Named on the official list | Public samples: ask the lab | Not on the list |
| PACE ANALYTICAL SERVICES, LLC - ORMOND BEACH | Ormond Beach, FL | Named on the official list | Public samples: ask the lab | Not on the list |
| PACE ANALYTICAL SERVICES, LLC- EAST LONGMEADOW | East Longmeadow, MA | Named on the official list | Public samples: ask the lab | Not on the list |
| SGS NORTH AMERICA INC - DAYTON | Dayton, NJ | Named on the official list | Public samples: ask the lab | Not on the list |
| SPL-READING | Reading, PA | Named on the official list | Public samples: ask the lab | Not on the list |
| ABINGDON WATER TREATMENT PLANT LABORATORY | Abingdon, MD | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
How the Maryland list marks public samples (whole list). Not stated per lab. MDE's Be Well Wise page tells private well owners to "Have your water tested periodically by a state-certified laboratory that conducts a drinking water test", but neither that page nor MDE's list says which labs take samples from private well owners.
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 PFAS in Maryland
EPA's 4.0 ng/L limits for PFOA and PFOS cover public water, not private wells, and its May 2026 proposals to roll back four other PFAS limits are not final. Read our PFAS explainer.
Maryland guidance that mentions PFAS:
- MDE's Laboratory Certification Program is the accreditation body for all certified drinking water labs in Maryland. It publishes a list of certified drinking water labs with each lab's approved tests, and a separate list of labs approved for PFAS. [1]
About 1,423,948 people in Maryland used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [2] 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: Maryland.
Other tests in Maryland
- Maryland Department of the Environment, Laboratory Certification Program (page last revised May 13, 2026)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (official list)
Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program).
Official source