Arizona

Commercial Rainwater Harvesting

City of Tucson ordinance mandating that commercial developments provide at least 50% of their irrigation needs with harvested rainwater.
www.ci.tucson.az.us/agdocs/20081014/oct14-08-564a.pdf

Residential Greywater Stub-Outs

City of Tucson ordinance mandating that all new home construction includes gray water stub-outs at time of building. Stub-outs are sections of drainage pipe installed during construction which allow for convenient and inexpensive redirection of household greywater to the landscape at a later time once the stub-out pipes are connected to the source drain(s).
www.ci.tucson.az.us/agdocs/20080923/sept23-08-527a.pdf