The Hygienic Laboratory also tests for asbestos, a group of similar minerals with separable, long, thin fibers. It is a natural mineral fiber that was used in products primarily because of its fire-retardant capability and strength. Asbestos has long been suspected as a health threat to humans, because the fibers can be inhaled and are difficult to remove from the lungs.

Asbestos testing is performed for businesses, state agencies and individuals. Materials that are frequently tested for asbestos include roofing, flooring and other items used in construction.