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Is Tucson, AZ tap water safe?

15 utilities serve Tucson, by EPA’s records. Here is what EPA’s and CDC’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

3 of the 15 utilities serving Tucson have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Flowing Wells Irrigation District, Adoc Tucson and Spanish Trail Water Company.

City of Tucson, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 63.7 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Tucson’s ZIP codes, from EPA’s estimates.

5 more utilities in Tucson

By EPA’s estimate, each serves fewer people in Tucson than those above.

  • Trails West MHPserves 500 people · nearly all in Tucson · no health-based violations since 2016
  • Far Horizons East MHPserves 870 people · about 480 in Tucson · no health-based violations since 2016
  • Halcyon Acres 2serves 144 people · nearly all in Tucson · no health-based violations since 2016
  • La Casita Water Company 2serves 264 people · nearly all in Tucson · no health-based violations since 2016
  • La Casita Water Company 1serves 171 people · nearly all in Tucson · no health-based violations since 2016

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in City of Tucson’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Tucson

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Arizona certifies.

The 3 labs Arizona certifies closest to Tucson, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Turner Laboratories, Inc.

    Tucson, AZ · under a mile

    (520) 882-5880

  • Complete Analytical Services, LLC

    Tucson, AZ · under a mile

    (520) 884-5811

  • Legend Technical Services of Arizona, Inc. DBA Legend Analytical

    Tucson, AZ · under a mile

    (520) 327-1234

All 49 certified labs for Arizona

ZIP codes in Tucson

Which ZIP codes are in Tucson: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Arizona Department of Health Services, Arizona certified commercial drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Tucson

Other towns in Pima County with a page of their own.

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