About this guide

East Valley Water Treatment Guide is an independent, hand-verified directory of water treatment companies serving the East Valley of Arizona. It was built from a Phase 2 research file dated 2026-11-02, company by company, from each company's own website, and the 20 companies were approved one by one in review on 2026-11-02.

How listings were verified

• A company's own website beats directories whenever they conflict. Directory phone numbers, addresses and license numbers were deliberately not used where they differed from the company's own site.
• License numbers appear only where the company's own website publishes one. 12 of the 20 companies in this guide publish an Arizona ROC number on their own website; 1 more publishes a license number without an ROC label and is not counted as ROC-licensed, 1 more is claim-only, and the remaining 6 publish no license number on their own site.
• Ratings appear only where the research file records one from the company's own site, with source and count where given. 7 of the 20 companies in this guide publish a rating with a review count on their own website.
• Prices appear only where a company publishes one on its own website. Only 5 of the 20 companies in this guide publish equipment, installation or service prices. Installed and from-prices found on company sites are quoted in the cost guide, labeled as such, never as fixed prices for every home. Financing figures are labeled as financing, never as prices.
• Companies that publish no street address on their own site are marked as such. No address was invented for them. One company, Parker & Sons, is shown without a street address because its address could not be confirmed on an opened own-site page; it is not counted among the two service-area companies.
• Company types are labeled. Most companies in this guide are water treatment specialists on their own site; where treatment is one division of a plumbing, HVAC or home services company, or where a company is a dealer for one brand, the profile states that plainly.
• No health claims are made in this guide. Services are described factually, as the companies describe them.

Featured listings

Featured listings are currently off for every company in this guide. No company paid for placement, and no company is marked as featured in the data. If a featured listing ever appears in future, it will be clearly labeled as a paid placement and will not change the verified facts in the profile. A featured label is never a quality endorsement.

Service-area companies

A service-area company serves the East Valley but publishes no street address on its own site. Those companies are marked as service-area companies in this guide.

Corrections

If a fact in a profile is wrong, write to [email protected] with the correction and a link to the page on your own website that shows it. We correct verified facts against the company's own website.

Photos on this site are illustrative and do not depict any listed company's own installations.