The conference report makes the following changes to the 4th edition. 

Amends GS 143-350 to add the term pretreatment mixing basin, meaning a basin created from lands that do not include waters of the state and in which raw water is mixed with reclaimed water before it is treated to the standards to make it suitable for potable water supply.

Amends GS 143-355.5 to amend the conditions that must be met in order for a local water supply system to combine reclaimed water with the source water treated to provide potable water supply to replace the term "impoundment" with "pretreatment mixing basin." Adds to those conditions that any discharge into the waters of the state must be pursuant to a permit issued under GS 143-215.1.

Deletes the provision requiring the Department of Environment and Natural Resources, in consultation with the Environmental Management Commission, to study the effects of chemicals of emerging concerns in wastewater effluent from municipal and privately operated wastewater treatment plants and in source water supplies.