Westminster, CO Radon Levels

Q: What EPA Radon Zone is Westminster in?

Westminster is in Adams County, EPA Zone 1.

Q: How much does radon mitigation cost in Westminster?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Westminster radon levels and find certified testing and mitigation professionals to keep your home safe

Westminster, CO Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Adams County, CO

Zip Code 80030

Located in Adams County within the Denver Metro area, Westminster sits on Colorado's Front Range where uranium-bearing granite and sedimentary formations contribute to elevated radon potential. Testing data for zip code 80030 remains limited, making professional radon testing essential for homeowners. The region's mix of newer suburban developments and established neighborhoods means foundation types vary significantly, affecting radon entry patterns.

8.00

pCi/L area average

Above EPA Action Level

Adams County average: 8.00 pCi/L, based on 8 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Westminster itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Westminster, CO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Westminster?

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Radon Readings Near Westminster, CO

No homeowner tests have been submitted for Westminster yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Arvada	4.4 mi	5.00 pCi/L	2
Broomfield	5.1 mi	5.00 pCi/L	1
Commerce City	6.9 mi	9.00 pCi/L	1
Denver	8.4 mi	6.22 pCi/L	9
Lafayette	10.5 mi	8.00 pCi/L	2
Brighton	13.2 mi	6.00 pCi/L	2
Erie	14.4 mi	20.00 pCi/L	1
Boulder	16.1 mi	12.00 pCi/L	1

Adams County Radon Profile

Adams County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Adams County average 8.00 pCi/L across 8 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Adams County to test, as levels can differ between neighboring homes.

Radon FAQ for Westminster, CO

What EPA Radon Zone is Westminster in?

Westminster and the 80030 zip code are in Adams County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Westminster?

No homeowner radon tests have been submitted for Westminster yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Adams County average—are the best available indicator of local conditions until Westminster homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Westminster?

Radon mitigation in Westminster typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Westminster?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.