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Is Naco, AZ tap water safe?

3 utilities serve Naco, 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 3 utilities serving Naco have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Naco Water Co Main, Arizona Water Co - Bisbee and Naco Estates.

Naco Water Co Main, which serves the most people here, has 1 result above the health goal. The worst: Arsenic at 2.2 ppb, above the health goal. 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 Naco’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 Naco Water Co Main’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 Naco

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 Naco 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 Naco

Which ZIP codes are in Naco: 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 Naco

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

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