Basic Course: Key Concepts

Introduction: Protecting Designated Uses of a Water Body

Water quality criteria are limits on particular chemicals or conditions in a water body. As elements of State/Tribal water quality standards, the criteria protect particular designated uses, such as propagation of fish and wildlife, recreation, and public water supply. The criteria can be expressed as acceptable levels (constituent concentrations) or as narrative statements.

Disclaimer:
For informational purposes only–Not official statements of EPA policy.