Rollinsville, CO Radon Levels

Q: What EPA Radon Zone is Rollinsville in?

Rollinsville is in Gilpin County, EPA Zone 1.

Q: How much does radon mitigation cost in Rollinsville?

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

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

Rollinsville, CO Radon Facts

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

County Gilpin County, CO

Zip Code 80474

High in Gilpin County's mountain terrain west of Denver, Rollinsville sits atop granite bedrock and mineralized soils that can contribute to elevated radon levels in mountain homes. Current testing data for zip code 80474 is limited, making individual home testing essential for residents at this elevation. Mountain communities often experience higher radon concentrations, making professional testing and potential mitigation particularly important.

13.00

pCi/L area average

Above EPA Action Level

Gilpin County average: 13.00 pCi/L, based on 4 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Rollinsville 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+

Rollinsville, 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 Rollinsville, CO

No homeowner tests have been submitted for Rollinsville 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
Black Hawk	7.1 mi	13.00 pCi/L	4
Golden	12.9 mi	9.00 pCi/L	2
Idaho Springs	13.3 mi	4.00 pCi/L	1
Boulder	14.7 mi	12.00 pCi/L	1
Evergreen	21.1 mi	10.00 pCi/L	1
Arvada	21.5 mi	5.00 pCi/L	2
Lafayette	22.2 mi	8.00 pCi/L	2
Broomfield	23.2 mi	5.00 pCi/L	1

Gilpin County Radon Profile

Because of its underlying geology, Gilpin County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 2 cities in Gilpin County average 13.00 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Gilpin County home regardless of zone or a neighbor's results.

Radon FAQ for Rollinsville, CO

What EPA Radon Zone is Rollinsville in?

Rollinsville and the 80474 zip code are in Gilpin 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 Rollinsville?

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

Radon mitigation in Rollinsville 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 Rollinsville?

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.