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Is San Luis, CO tap water safe?

2 utilities serve San Luis, by EPA’s records. Here is what EPA’s and Colorado’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

Neither of the 2 utilities serving San Luis has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Colorado’s records.

San Luis WSD, which serves the most people here, has 1 result above the health goal. The worst: Uranium at 4.4 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 San Luis’s ZIP codes, from EPA’s estimates.

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 Colorado certifies.

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

  • Sangre De Cristo Laboratory

    Alamosa, CO · about 35 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

All 54 certified labs for Colorado

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: CDPHE certified drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near San Luis

Towns nearby with a page of their own.

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