Presentation by Alan Duncan, Don Peden and Debbie Bossio, Leiden, February 2010. Water is used for many things in rural areas including domestic use (drinking, washing), irrigation of crops, inputs into small businesses, livestock watering, fisheries to mention but a few. Investments in rural water provision usually focus on single use, either domestic or irrigation. There has been a move in recent years to add value to such investments by thinking about multiple uses of water when designing investments: the terms “domestic +” and “irrigation +” have been coined. A Multiple Water Use Services (MUS) workshop was recently held in Leiden to develop methods of assessing cost and benefits of water investments when viewed through the “MUS lens”.