Isla Urbana, an environmental group in Mexico City, Mexico, is a big supporter of rainwater harvesting as a solution to the area's water problem. The concent may especially be right for ones not regularly getting water from the city's water system.

According to an article posted, the director of Isla Urbana says "rainwater harvesting is a natural fit in Mexico City, since over a million homes already have tanks, or cisterns, for storing water from either the intermittent city water system or delivery trucks."

However, not everyone in the area is a proponent of rainwater systems. One city official in particular noted that the cost and technology can make the concept "out of reach" for residents.

Read more about this concept in Mexico City. To learn about your local water supply, visit DrinkTap's "Your Local Water" webpage.