Last week, I posted a graph of my household water use for the past few years and challenged our readers to identify as many interesting characteristics about my household as they can. Often, the only data a water utility has on their customers are what they have in their billing records. Other household characteristics, such as size of household, income, age, house and lot size and features, water use behavior and preferences, etc., are very difficult to obtain for each customer. However, as demonstrated by my own personal example, mining the billing data alone can reveal much about each household. Here is what my water use history reveals about my household, and the application of this exercise in water resources and utility finance management.