20.7.3.810 GRAYWATER DISCHARGES: Graywater discharge of less than 250 gallons per day of private residential graywater originating from a residence for the resident’s household flower gardening, composting or landscaping irrigation shall be allowed if:
Tucson, Arizona is the first municipality in the country to require developers of commercial properties to harvest rainwater for landscaping.All new developments must meet 50 percent of their landscaping water needs by capturing rainwater. The new rule goes into effect June 1, 2010.