What should the turbidity of settled water before it is applied to the filters be kept below?

The turbidity of settled water before it is applied to the filters should be kept below 1 to 2 NTU to ensure effective filtration and to protect the integrity of the filtration system. Turbidity measurements provide an indication of the presence of suspended solids in the water, which can hinder the filtration process if they are too high.

When turbidity levels are above 1 to 2 NTU, it becomes increasingly likely that the filters will become clogged more quickly, reducing their efficiency and increasing maintenance needs. Consequently, maintaining turbidity below this threshold assists in extending the operating life of the filters, enhancing the overall water treatment process and resulting in cleaner, higher-quality water for distribution.