TESTMARK Laboratories Ltd. is a proven leader in the provision of licensed and accredited environmental lab testing. We provide routine and customized analyses in the areas of inorganic, organic, microbiological and toxicological testing. We believe in the value of local infrastructure and are proud to offer laboratory services at the following locations across Ontario: Garson/Sudbury, Timmins, Kirkland Lake, Thunder Bay and Mississauga.TESTMARK provides comprehensive analysis of drinking water, groundwater, waste water, air, soils and sediment, biota and liquid industrial waste.