Your Local Resource For Soil & Water Testing

Since 1976, Stewart Laboratories, Inc. has provided fast and accurate results for environmental monitoring and compliance. Our superior services, which include same-day sample pick-up and rush analysis, saves our customers time and money.


Located conveniently off of Interstate 80 in Strattanville, Stewart Laboratories services utilities, municipalities, engineers, consultants, private companies and individuals for all of their analytical needs.


We work hard to be the leader in environmental testing and analysis. Samples can be collected by our dedicated staff, picked up at your most convenient location, or simply mailed to or dropped off at our lab.  Please contact us for more information on our convenient and economical services.


Stewart Laboratories is prepared to test for:

Certified by the Pennsylvania Department of Environmental Protection