Regular data collection of a building's energy and water use provides building owners/operators with a real understanding and insight into the actual operation of their buildings. Building owners can then use this knowledge to achieve a range of significant benefits such as energy and dollar savings of up to 40 per cent which leads to an inherent reduction in pollution through increased efficiency. Other more subtle benefits include an ongoing 'awareness' throughout the building, better stakeholder relationships and good corporate citizenship. This note will examine the various forms of information that are readily available, as well as other sources that can provide further data. Using this data, the note then explores some of the ways that information can be effectively utilised.