What is the standard for acceptable turbidity in potable water?

The correct standard for acceptable turbidity in potable water is 1.0 NTU (Nephelometric Turbidity Units). This level is established by various health and environmental agencies, including the U.S. Environmental Protection Agency (EPA), to ensure that drinking water is clear and safe for consumption. Turbidity can indicate the presence of contaminants such as microorganisms, sediment, or organic material that could affect water quality and safety.

Maintaining turbidity at or below this level helps prevent negative health impacts, as higher turbidity levels may harbor pathogens and contaminants that could pose risks to public health. Therefore, a turbidity threshold of 1.0 NTU is crucial in ensuring that potable water is adequately treated and monitored, ensuring the safety of drinking water supplies.