The amount of color in water should be less than which of the following?

The correct response indicates that the acceptable limit for color in drinking water is less than 5 color units. This standard aligns with various environmental health guidelines which establish maximum threshold levels for drinking water quality to ensure safety and aesthetic quality.

Color in water can result from various natural and anthropogenic sources, including dissolved organic materials (like tannins and lignins), metal ions, and other contaminants. High levels of color in water can indicate the presence of these substances, which may lead to concerns regarding taste, odor, and overall water safety.

Setting a threshold of 5 color units helps to ensure that the water is aesthetically pleasing and free from potential contaminants that could compromise health or safety. It is essential for public health officials and environmental health specialists to monitor these parameters closely to maintain water quality, ensuring it meets both safety regulations and public perceptions of cleanliness.