This memorandum summarizes major state and federal water quality control policies pertaining to nutrients; describes the major provisions of the new Section 17 of Regulation 31 that establishes interim numeric values for phosphorus, nitrogen and chlorophyll; describes the new Regulation 85 that establishes numerical effluent limitations for domestic wastewater treatment plants and other wastewater dischargers; summarizes the rule review process of the Colorado General Assembly; and describes the U.S. Environmental Protection Agency's (EPA) review process for new water quality standards.
