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Is Ajo, AZ tap water safe?

3 utilities serve Ajo, 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

None of the 3 utilities serving Ajo has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records.

Arizona Water Co - Ajo, which serves the most people here, has nothing above a health goal in EPA’s and CDC’s records. That data covers what its report lists, not everything.

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

Water testing near Ajo

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.

No lab Arizona certifies is within 75 miles of Ajo on the state’s list. Some take samples by mail; the state’s page lists them all.

All 49 certified labs for Arizona

ZIP codes in Ajo

Which ZIP codes are in Ajo: 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.

Near Ajo

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

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