Which of the following best describes the purpose of filtration in water treatment?

Filtration in water treatment serves the critical function of removing remaining solids and impurities from water. After processes like coagulation and sedimentation, where larger particles are settled out, filtration further polishes the water by capturing fine particles, bacteria, and other contaminants that may still be present. This step is essential to ensure that the water meets health and safety standards for drinking purposes.

The effectiveness of filtration not only helps in producing clear water but also plays a significant role in the overall quality and safety of the water supply. By utilizing various types of filter media, such as sand, gravel, or more advanced materials, filtration systems can effectively reduce turbidity and provide a final layer of protection against potential pathogens and chemical pollutants.

Although other options mention important aspects of water treatment, they do not accurately capture the primary role of filtration. Adding chemicals that improve taste is a separate process, and while enhancing sedimentation can be part of the treatment process, it is not the purpose of filtration itself. Similarly, monitoring water quality is essential for overall management but does not define the direct action of filtration in removing impurities from the water.