Filtered water must meet what turbidity standards?

Filtered water must meet a turbidity standard of 0.3 NTUs or less in 95% of samples. This standard is set to ensure that the treated water is of sufficient clarity and quality for drinking purposes, as elevated turbidity can indicate the presence of pathogens and other harmful substances. Maintaining turbidity at or below this level in a majority of samples helps to ensure the effectiveness of the filtration processes and the overall safety of the water supply.

The rationale behind targeting a threshold of 0.3 NTUs is linked to the relationship between turbidity and water quality standards for public health. By ensuring that the water meets this turbidity level in 95% of the samples, water treatment facilities can demonstrate reliable performance while allowing for minor fluctuations under certain circumstances.

Additionally, achieving stricter turbidity thresholds, while commendable, may not be practical or necessary in every situation. Therefore, the 0.3 NTUs standard balances the need for safe drinking water with operational feasibility.