Which method does not apply in the removal of suspended materials and color in the water supply?

The method that does not apply to the removal of suspended materials and color in the water supply is chlorination. Chlorination is primarily a disinfection process used to kill bacteria, viruses, and other pathogens in water. While it plays a crucial role in ensuring the microbiological safety of drinking water, chlorination does not effectively remove suspended solids or color from the water.

In contrast, sedimentation, coagulation, and filtration are all processes designed to reduce turbidity by removing suspended particles. Sedimentation allows heavier particles to settle at the bottom of a container over time due to gravity. Coagulation involves adding chemicals that cause small particles to clump together, making them easier to remove. Filtration physically removes particles from water as it passes through a filter medium. Therefore, chlorination's purpose and function differ significantly from those methods aimed at removing physical impurities.