Is Keenesburg, CO tap water safe?
The short answer
1 of the 2 utilities serving Keenesburg has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Colorado’s records: Town of Keenesburg.
Town of Keenesburg, which serves the most people here, has 3 results above the health goal. The worst: Arsenic at 5.0 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 Keenesburg’s ZIP codes, from EPA’s estimates.
- Open report
Town of Keenesburg
Colorado · serves 4,650 people · under 100 in Keenesburg
3 results above the health goal. The worst: Arsenic at 5.0 ppb, above the health goal.
2 health-based violations since 2016
- Open report
Cavanaugh Hills WS
Colorado · serves 286 people · under 100 in Keenesburg
1 result above the health goal. The worst: Arsenic at 3.7 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Town of Keenesburg’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Keenesburg
The 3 labs Colorado certifies closest to Keenesburg, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Colorado Analytical Laboratory - Commerce City
Commerce City, CO · about 22 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Murray-Brown Laboratories, LLC.
Northglenn, CO · about 24 miles
Certified for bacteria
SGS North America, Inc. - Denver
Denver, CO · about 25 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics
Which ZIP codes are in Keenesburg: 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 Keenesburg
Other towns in Adams County with a page of their own.
What to do next
- Read Town of Keenesburg’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water