Turbidity in water refers to the cloudiness or haziness of the water due to the presence of suspended particles such as clay, silt, sediment, and organic matter. These particles are known to enter the water from a variety of sources, including erosion of soil, discharge from wastewater treatment plants, and runoff from construction sites. High levels of turbidity can be visual indicators or poor water quality, affecting the taste and appearance of the water, which can also make it difficult for disinfectants to penetrate and kill bacteria and other microorganisms. As a result of this, water treatment plants will often use coagulants and flocculants to remove suspended particles and reduce turbidity.