Providing a high-quality water supply to all sectors of society is one of the most pressing and difficult challenge facing cities across Southeast Asia. Water supply is an expensive proposition in low income countries and often tradeoffs have to be made among such attributes as purity, reliability of delivery, private vs. shared connections and so on. Information about what attributes are most important to consumers and how much they can afford to pay for them, is thus very valuable to decision makers. Because of this, the results of a new study from Ho Chi Minh City, Vietnam, are particularly interesting. Not only do they show how much the people in the city value a high-quality piped water connection, but they also throw new light on two different methods of assessing and quantifying this demand.