A water mass balance project is undertaken when you seek to understand and document the flow of water in, and waste out, of your business.  The review process considers all points of usage and includes allowance for potentially overlooked areas such as evaporation loss etc. Gaining a complete understanding of every facet of your water usage is a complex process, but it will ultimately ensure you are not wasting water or missing an opportunity to reduce your consumption further. Benchmarking is a more straight forward exercise which can help you better understand your current levels of efficiency by comparing your performance with that of similar organisations or across your own portfolio of sites. The UK Water team have access to a number of metrics that will help you quantify your consumption and guide you on where your future efficiency efforts will be best placed.