indicators are environmental performance parameters or attributes that demonstrate environmental impact or improvement. Indicators can be either qualitative of quantitative and include a comparative scoring system.

Indicators can represent impact across a number of lenses (e.g., water, waste, etc.) as well as be generic enough to apply to any facility (facility systems indicators). Lastly, in the bridge between indicators and metrics, the footprinting indicators are designed to signify the presence and quality of data (metrics).