For Diageo, the drinks company, agricultural suppliers typically represent more than 90% of its water footprint, so of course it's vital that the company’s water strategy looks beyond its own four walls to consider sustainable water management and risks in the supply chain. By contrast, what matters most for Unilever in tackling its global water footprint is reducing consumers’ water use when they are doing laundry, showering and washing their hair, particularly in countries where water is scarce. Asking office staff to report dripping taps will contribute to the firm’s water efficiency, but it is much less useful than innovating a generation of products that use less water for cleaning.

Once you know what the main water-using phases are in your product or service system, you can prioritise and target. the audiences you want to engage.

This article in the environmentalist looks at the questions you need to ask yourself, to work out how to engage people in water efficiency. You can download it here or read it online on the environmentalist's website (you may need to log in or sign up for a free trial to read it online).