Most solids should be removed in the filtration step. True or False?

The statement is false because while the filtration step in water treatment is indeed important for removing solids, it does not typically eliminate all types of solids present in the water. Filtration primarily targets larger particles and certain suspended solids, but finer particles and colloids can often pass through standard filtration processes. Therefore, the effectiveness of filtration in removing solids varies depending on the type of filter media used, the size and type of solids, and the specific treatment processes in place.

In most contemporary water treatment processes, additional steps such as sedimentation or chemical treatment may be required to effectively remove smaller or dissolved solids that filtration alone cannot address. This helps ensure that the water is adequately purified for safe consumption. Thus, while most solids are removed in filtration, not all solids can be mandated for removal during this stage, justifying the false nature of the statement.