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Is Pima, AZ tap water safe?

3 utilities serve Pima, 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

2 of the 3 utilities serving Pima have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Graham County Utilities - Pima and Graham County Utilities - Fort Thomas.

Graham County Utilities - Pima, which serves the most people here, has 1 result above the health goal. The worst: Arsenic at 3.4 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 Pima’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 Graham County Utilities - Pima’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 Pima

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 Pima 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 Pima

Which ZIP codes are in Pima: 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 Pima

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

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