1200 W. Washington Street

Phoenix, AZ 85007-2927


Phoenix Office: (602) 542-4251


Tucson Office: (520) 628-6550


Toll Free In-State Only:

1-(800) 222-7000


The Arizona Corporation Commission maintains regulatory authority over private water companies and private wastewater companies throughout Arizona. There are presently more than 400 individual water systems operated by nearly 350 companies under our jurisdiction. There are approximately 21 wastewater companies and 20 combination water and wastewater providers that we regulate. Multiple systems can be operated by the same utility company.

Several other agencies also have jurisdiction over aspects of running a reliable water system. Questions related to water quality, water pollution or contaminants in drinking water should be directed to ADEQ. For information regarding these other agencies, visit our Frequently Asked Questions page for helpful information to know more about how we regulate water and wastewater companies in Arizona.

Helpful Links:


Water Companies with ACC Water Conservation Tariffs

The ACC sometimes requires a water company to implement best management practices (BMPs) selected from Arizona Department of Water Resources list of BMP's.

For more information, go to:


Stay Connected

Arizona Corporation Commission

1200 W. Washington Street

Phoenix, AZ 85007


Corporations Division

1300 W. Washington Street

Phoenix, AZ 85007


Tucson Office (Walk-ins only)

400 W. Congress Street

Tucson, AZ 85701