What is the action level for turbidity in drinking water?

The action level for turbidity in drinking water is set at 1 NTU (Nephelometric Turbidity Units) for any sample. This standard is based on the belief that high levels of turbidity can interfere with the disinfection process, and thus increase the risk of disease-causing microorganisms being present in the water supply. Turbidity can indicate the presence of pathogens or cause other quality issues, which is why maintaining it at or below 1 NTU is considered vital for safeguarding public health.

By keeping turbidity levels within this limit, water treatment facilities can effectively ensure that the water is both safe and aesthetically pleasing for consumers. The establishment of this action level is part of the regulatory framework designed to protect drinking water quality, adhering to guidelines set by organizations such as the Environmental Protection Agency (EPA).