What is a notable feature of Secondary Drinking Water Regulations?

Secondary Drinking Water Regulations are indeed notable because they serve as recommendations rather than mandatory requirements. These regulations are designed to address non-health-related contaminants that may affect the aesthetic qualities of drinking water, such as odor, taste, and color. While they are important for maintaining water quality and ensuring public satisfaction, they do not carry the same legal enforceability as primary drinking water standards, which focus on health-related contaminants that could directly impact human health.

Thus, the emphasis on secondary regulations being guidelines rather than enforceable laws is crucial for understanding the framework of water quality management. It allows water systems to better balance public health concerns with practical considerations related to the sensory properties of water.