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Is Douglas, AZ tap water safe?

5 utilities serve Douglas, 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 5 utilities serving Douglas have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Monte Vista Water Company, Twin Buttes Rv, LLC and La Costa Water Users Assoc.

City of Douglas, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 152 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 Douglas’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 Douglas’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 Douglas

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 Douglas 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 Douglas

Which ZIP codes are in Douglas: 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 Douglas

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

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