Jamestown, CO Radon Levels

Q: What EPA Radon Zone is Jamestown in?

Jamestown is in Boulder County, EPA Zone 1.

Q: How much does radon mitigation cost in Jamestown?

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

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

Jamestown, CO Radon Facts

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

County Boulder County, CO

Zip Code 80455

Set high in Boulder County within the Boulder Metro area, Jamestown (zip code 80455) sits where Colorado's mountain geology creates EPA Zone 1 high radon potential. Testing data for this small mountain community is currently limited, making professional radon assessment crucial given the area's elevation and geological conditions. The town's mix of historic cabins and modern mountain homes, often with unique foundation designs, requires individual evaluation for radon risk.

10.17

pCi/L area average

Above EPA Action Level

Boulder County average: 10.17 pCi/L, based on 6 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Jamestown 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+

Jamestown, CO Radon Mitigation

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

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Radon Readings Near Jamestown, CO

No homeowner tests have been submitted for Jamestown 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
Lyons	9.0 mi	14.50 pCi/L	2
Boulder	9.9 mi	12.00 pCi/L	1
Longmont	17.0 mi	8.00 pCi/L	4
Erie	17.3 mi	20.00 pCi/L	1
Lafayette	17.5 mi	8.00 pCi/L	2
Berthoud	19.6 mi	12.00 pCi/L	2
Black Hawk	21.2 mi	13.00 pCi/L	4
Broomfield	21.7 mi	5.00 pCi/L	1

Boulder County Radon Profile

Boulder 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 Boulder County average 10.17 pCi/L across 6 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 Boulder County to test, as levels can differ between neighboring homes.

Radon FAQ for Jamestown, CO

What EPA Radon Zone is Jamestown in?

Jamestown and the 80455 zip code are in Boulder 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 Jamestown?

No homeowner radon tests have been submitted for Jamestown yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Boulder County average—are the best available indicator of local conditions until Jamestown 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 Jamestown?

Radon mitigation in Jamestown 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 Jamestown?

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.