This metric is based on the Global Reporting Initiative (GRI) G4 Guidelines. It covers one of the reporting requirements of Indicator G4-EN10 – 'Percentage and total volume of water recycled and reused'. This metric is for recording the total volume of water recycled and reused as a percentage of the total water withdrawal reported under Indicator G4-EN8 .

​This Indicator measures both water that was treated prior to reuse and water that was not treated prior to reuse. Grey water (that is, collected rainwater and wastewater generated by household processes such as washing dishes, laundry, and bathing) is included.

The rate of water reuse and recycling is a measure of efficiency and demonstrates the success of the organization in reducing total water withdrawals and discharges. Increased reuse and recycling may result in a reduction of water consumption, treatment, and disposal costs. The reduction of water consumption over time through reuse and recycling may also contribute to local, national, or regional goals for managing water supplies.