Particulate Matter, Turbidity, and Color

Abstract

Particles too large to be in true solution but small enough to remain suspended against the force of gravity comprise the particulate matter in water. These particles create turbidity and impart color to water. Particulate matter is of both organic and inorganic origin and includes living organisms, detritus, and soil particles. Turbidity caused by particles restricts light penetration and has a powerful effect upon growth of plants in aquatic ecosystems. Suspended particles also settle creating bottom deposits, and high rates of sedimentation can result in severe bottom habitat degradation. Water for drinking purposes and for some industrial uses is degraded by significant amounts of turbidity or color, and treatment often must be applied to remove these substances. Particulate matter, turbidity, and color are important water quality variables.