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Adams County · EPA Radon Zone 1

Radon Testing & Mitigation in Westminster, Colorado

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Adams CountyWestminster

Westminster at a glance

Population
116,317 total (71,240 in Adams County, 45,077 in Jefferson County)
County
Adams County
Incorporated
April 4, 1911
Area
33.9 sq mi
EPA Radon Zone
Zone 1 (highest risk classification)
School district
Adams County School District 50

Population: U.S. Census Bureau 2020 Decennial Census.

Radon in Westminster

Westminster is located in Adams County, which the U.S. Environmental Protection Agency designates as Radon Zone 1 — the highest-risk classification, indicating predicted average indoor radon levels at or above the EPA action level of 4 pCi/L.

Westminster is a bi-county city — 71,240 residents live in the Adams County portion, with the remaining 45,077 in Jefferson County. Incorporated 1911, much of the older housing stock predates modern radon-resistant construction standards. The Adams County portion sits within EPA Radon Zone 1.

Statewide, 46.9% of pre-mitigation home radon tests in Colorado come back at or above the EPA action level (4 pCi/L), based on 214,362 tests in the CDPHE 2005–2024 statewide dataset. Whether you own or rent in Westminster, testing is the only way to know your home's level.

Radon costs in Westminster → What a mitigation install typically runs in Colorado, and the factors that move the price up or down.

Sources: U.S. EPA Map of Radon Zones; CDPHE Colorado Radon Tests 2005–2024; U.S. Census Bureau 2020 Decennial Census; city naming via Wikipedia.

Colorado Radon Check services Adams County

Get a free quote for radon mitigation in Adams County.

We’re NRPP-certified and Colorado state-licensed. A standard sub-slab depressurization install reduces indoor radon by 95%+ in most Adams County homes — exact quote in 24 hours.

  • 24-hour quote turnaround
  • Installed in 4–6 hours
  • Post-install re-test included
  • Radon-mitigation listing feature

Or call us at (866) 398-9858 — same-day response during business hours.

Prefer the data first? Download the free Colorado Radon Risk Map.

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Other Adams County cities

Same county, same EPA Radon Zone 1 classification.

See the full county dataset at Adams County radon levels.