Except as provided in subch. VI, new facilities issued a WPDES permit after October 1, 2010, shall be designed to meet applicable water quality-based effluent temperature limitations, as determined in this subchapter, on the effective date of the WPDES permit. The department may require a permittee to provide diffusers or other such devices to ensure rapid mixing of effluent into the water body receiving the discharge or may require a mixing zone analysis to demonstrate that the proposed mixing zone of the new POTW discharge will meet the mixing zone provisions of s. NR 102.05(3).
Wis. Admin. Code Department of Natural Resources NR 106.60