Greywater is water that has been used in washing machines, bathroom showers and tubs, and bathroom and laundry sinks. Though not suitable for drinking or cooking, this water is a good resource for landscape irrigation as an alternative to using potable water. Installing a greywater system to re-use this water is a great way to make the most of our limited water resources. 

Visit Tucson Water’s website for more information about using greywater:

Download AZDEQ’s brochure on using greywater:

Arizona Tax Credits for Water Conservation (ends Jan. 2012)

Effective January 1, 2007, Arizona taxpayers who install a “water conservation system” (defined as a system to collect rainwater or residential greywater) in their residence may take a one-time tax credit of 25% of the cost of the system up to a maximum of $1,000. Builders are eligible for an income tax credit of up to $200 per residence unit constructed with a water conservation system installed. Click here to download information about the tax credit from the AZ Dept. of Revenue.

Review Brad Lancaster’s list of greywater resources:

Review the University of Arizona Water Resources Research Center’s article “Home Use of Graywater, Rainwater Conserves Water--and May Save Money” at

Use reclaimed water for irrigation. Tucson Water has been delivering reclaimed water to customers for irrigation use for more than 20 years. Visit to learn more about Tucson’s reclaimed water program and how to become a reclaimed water customer.

Wash your vehicle at home. One visit to the car wash can use 55 gallons of water or more. Wash your car at home out of a one gallon bucket and use a spray nozzle for rinsing. If you park your car on your lawn or front yard, you can give your lawn a free watering with the greywater that runs off.