Is Firestone, CO tap water safe?
The short answer
None of the 7 utilities serving Firestone has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Colorado’s records.
City of Longmont, which serves the most people here, has 1 result above the health goal. The worst: Lead at 1.6 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 Firestone’s ZIP codes, from EPA’s estimates.
- Open report
City of Longmont
Colorado · serves 104,178 people · about 3,800 in Firestone
1 result above the health goal. The worst: Lead at 1.6 ppb, above the health goal.
No health-based violations since 2016
- Open report
Town of Firestone
Colorado · serves 27,798 people · about 1,500 in Firestone
1 result above the health goal. The worst: Lead at 3.6 ppb, above the health goal.
No health-based violations since 2016
- Open report
Town of Frederick
Colorado · serves 17,173 people · about 710 in Firestone
1 result above the health goal. The worst: Lead at 2.9 ppb, above the health goal.
No health-based violations since 2016
- Open report
Left Hand WD
Colorado · serves 20,280 people · about 650 in Firestone
1 result above the health goal. The worst: Lead at 1.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Central Weld Cnty WD
Colorado · serves 7,662 people · about 640 in Firestone
1 result above the health goal. The worst: Lead at 6.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Little Thompson WD
Colorado · serves 25,654 people · about 220 in Firestone
1 result above EPA’s new limit, which takes effect in 2029 and 1 result above the health goal. The worst: PFOA at 4.8 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Eagle Crest MHP
Colorado · serves 441 people · under 100 in Firestone
1 result above the health goal. The worst: Lead at 0.5 ppb, above the health goal. Hardness: soft, typically 26 mg/L (1.5 grains per gallon).
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 City of Longmont’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Brita Tahoe Pitcher with Elite Filter (OB60, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 13, 2026
Certified for: Lead
Brita Everyday Pitcher with Elite Filter (OB46, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
Certified for: Lead
PUR PLUS 11-Cup Pitcher (PPT111W)
Pitcher
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
Certified for: Lead
Water testing near Firestone
The 3 labs Colorado certifies closest to Firestone, 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 17 miles
Certified for bacteria
Colorado Analytical Laboratory - Commerce City
Commerce City, CO · about 18 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
EAnalytics Laboratory
Loveland, CO · about 22 miles
Certified for bacteria
Which ZIP codes are in Firestone: 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 Firestone
Other towns in Boulder County with a page of their own.
What to do next
- Read City of Longmont’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for LeadRanked by certification and what they cost over five years.The best water filters for lead, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water