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Is San Luis, AZ tap water safe?

4 utilities serve San Luis, 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 4 utilities serving San Luis 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 San Luis and Aspc Yuma.

City of San Luis, which serves the most people here, has 1 result above the legal limit, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Total trihalomethanes (TTHM) at 60.3 ppb, above the legal limit.

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 San Luis’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 San Luis’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 San Luis

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 2 labs Arizona certifies closest to San Luis, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Fresh Terra Services, LLC.

    Yuma, AZ · about 33 miles

    (928) 257-3601

  • Eurofins Microbiology Laboratories

    Yuma, AZ · about 33 miles

    (928) 317-1127

All 49 certified labs for Arizona

ZIP codes in San Luis

Which ZIP codes are in San Luis: 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 San Luis

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

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