An investment worth $25 million (£17m) will be made in a US state to improve water quality as well as reduce pollution.
The Environmental Protection Agency (EPA) is providing the cash which will also be used for wastewater infrastructures in Arizona.
The Water Infrastructure Finance Authority will fund the projects across the region, focusing on small communities.
The money will support water treatment, distribution, transmission and storage infrastructures.
It will also back the installation and improvement of treatment plants, sewer collection systems and water reuse facilities.
Jared Blumenfeld, EPA’s Regional Administrator for the Pacific Southwest said: “This substantial investment at the federal level helps communities develop the infrastructure needed for clean, safe drinking water and proper wastewater treatment. EPA is committed to protecting the water resources so important to public health and Arizona’s economy.”