There are many natural constraints to access to freshwater, such as the uneven distribution of water in different regions, and the variable effects of weather.
Urban water use statistics usually combine the richest and poorest residents in a single average which disguises the daily reality of the poor majority in large slums who lack reasonable access to safe water. For their small share of water, the urban poor pay an unfair price, usually at least four and sometimes as much as ten times more per litre than the metered rates of those living in the elite residential areas.