Even though it was passed 14 October 2008 and does not take effect until 1 June 2010, Tucson's rainwater harvesting ordinance has recently attracted much national attention. It's the first such municipal ordinance that requires rainwater harvesting for new commerical developments.
The ordinance requires that new commercial developments obtain 50% of their landscaping water needs via rainwater harvesting, with certain exceptions.
Here is a copy:
The city has a rainwater harvesting WWW site with more information and resources, including a water budget spreadsheet.
You can obtain more information on the WWW site of the American Rainwater Catchment Systems Association (ARCSA).
A good idea.
"I suggest that the national government come out with a policy that makes all high rise and commercial and government establishments to resort to rainwater harvesting immediately." --Subash, an Indian blogger

Why not 100% rainwater. Really. Why have irrigated landscape in the desert?
Posted by: David Zetland | July 08, 2009 at 06:31 AM