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Is Welby, CO tap water safe?

2 utilities serve Welby, 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

1 of the 2 utilities serving Welby has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Colorado’s records: North Washington Street WSD.

City of Thornton, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 7.1 ppt, above EPA’s new limit, which takes effect in 2029.

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 Welby’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 Thornton’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 Welby

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

  • Murray-Brown Laboratories, LLC.

    Northglenn, CO · about 3 miles

    Certified for bacteria

  • Colorado Analytical Laboratory - Commerce City

    Commerce City, CO · about 5 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

  • SGS North America, Inc. - Denver

    Denver, CO · about 8 miles

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

All 54 certified labs for Colorado

ZIP codes in Welby

Which ZIP codes are in Welby: 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 Welby

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

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