This figure is the sum of all of the suspended material found in a water sample or process stream. Sometimes suspended solids may be referred to as Total Suspended Solids (TSS) or Total Filterable Solids (TFS). Units for suspended solids are milligrams per liter, mg/l or parts per million, ppm. PPM and mg/l are two forms of measurement that are equal to each other (1 ppm 1 mg/ L).
Total Suspended Solids are removed from the process stream by strainers or filters.