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Is Williamson, AZ tap water safe?

10 utilities serve Williamson, 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 10 utilities serving Williamson have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: City of Prescott, Chino Meadows II and American Ranch Dwid.

City of Prescott, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 11.4 ppt, above EPA’s new limit, which takes effect in 2029.

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 Williamson’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in City of Prescott’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 Williamson

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 Williamson, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Bradshaw Mountain Environmental Inc.

    Prescott Valley, AZ · about 28 miles

    (928) 778-4510

  • Inner Basin Environmental, LLC

    Flagstaff, AZ · about 70 miles

    (928) 440-5168

  • Nortest Analytical

    Flagstaff, AZ · about 70 miles

    (928) 774-2312

All 49 certified labs for Arizona

ZIP codes in Williamson

Which ZIP codes are in Williamson: 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 Williamson

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

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