This chapter of the law that establishes the Ohio Environmental Protection Agency outlines the minimum water quality requirements for all surface waters of the state.
Water quality standards contain two distinct elements: designated uses; and numerical or narrative criteria designed to protect and measure attainment of the uses.
Each water body in the state is assigned one or more aquatic life habitat use designations.
Each water body may be assigned one or more water supply use designations and/or one
recreational use designation.
Statewide chemical-specific criteria for the support of use designations are presented in
Each water resource area has its own specific section, detailing minimum standards and requirements for those areas. Wetlands are also covered under this rule.