When we refer to rejected water from pre-treatment, we are talking about freshwater being treated before it is used within the facility. This water may go through sand or other filtration processes, leading to the rejection of some water.
This rejected water quantity has often not been accounted for in the facility's consumption in previous assessments. All facilities are encouraged to record and report the quantity of water that is rejected, as it is part of the initial water source within the facility, even though it is ultimately rejected and disposed of.