Is Phoenix tap water safe to drink?

What the City of Phoenix reports

The City of Phoenix Water Services Department’s annual water quality report for 2025 states: “In 2025, tap water delivered to approximately 1.7 million residents served by the City of Phoenix Water Services Department met or surpassed all federal and state drinking water standards.”

The same report discloses one monitoring lapse: during May 2025 the city did not complete all of its required monitoring for total coliform, E. coli and chlorine. The city says the incident posed no health risk, that no E. coli was found, and that chlorine levels were within EPA limits.

Other Valley cities

Each city or water company publishes its own report, and wording varies. The reliable way to answer “is my tap water safe?” is to read your own provider’s annual water quality report; the utility for each city on this site is named and linked on its city page.

Hardness isn’t a safety issue

Hardness is calcium and magnesium. The World Health Organization’s background document on hardness proposes no guideline value for it, and the University of Nebraska–Lincoln Extension states plainly that hard water is not a health risk, though it is a nuisance for plumbing fixtures and soap. The U.S. EPA has no primary or secondary standard for hardness.

When people still filter

Even where water meets every standard, some households prefer the taste of filtered water, or want fewer dissolved minerals. A carbon filter mainly improves taste and smell; a reverse osmosis unit at the kitchen sink removes most dissolved minerals. A softener does neither; it removes hardness.