As a service to CAP customers, a robust monitoring program is in place to provide water users with valuable information regarding source and canal water quality. The monitoring program consists of both real-time measurements and monthly/quarterly grab samples. Information on this web page is available for both CAP water users and the public to view and download. Our Annual Water Quality Report summarizes results from CAP’s monitoring program.

See past annual reports


Lower Colorado River Water Quality Partnership

Central Arizona Project works closely with the Metropolitan Water District of Southern California and Southern Nevada Water Authority to address a range of initiatives and programs related to water quality in the lower Colorado River. These programs include environmental protection, Lake Mead conservation, and safeguarding the quality of water that we deliver to our customers. For more information about the Partnership, click on the link below.

Lower Colorado River Partnership Fact Sheet


Water users: Sign up for email distribution list

To sign up for CAP’s water quality notifications, please email your name and organization to info@cap-az.com. Notifications sent to this list pertain to water quality items such as algal blooms, cymbella, turbidity, and Alamo Dam releases. 

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