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Is Keystone, CO tap water safe?

6 utilities serve Keystone, 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 6 utilities serving Keystone has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Colorado’s records: Keystone Ranch.

East Dillon WD, which serves the most people here, has 2 results above the health goal. The worst: Lead at 4.2 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 Keystone’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 East Dillon WD’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 Keystone

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 Keystone, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • GeoWater Services

    Evergreen, CO · about 27 miles

    Certified for bacteria

  • Gilpin County Public Health Agency

    Black Hawk, CO · about 29 miles

    Certified for bacteria

  • Eagle River W / S District

    Avon, CO · about 31 miles

    Certified for bacteria, lead and copper, metals, radioactivity

All 54 certified labs for Colorado

ZIP codes in Keystone

Which ZIP codes are in Keystone: 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 Keystone

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

What to do next