Larkspur, CO Radon Mitigation and Testing

Q: What EPA Radon Zone is Larkspur in?

Larkspur is in Douglas County, EPA Zone 1.

Q: How much does radon mitigation cost in Larkspur?

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

Douglas County

EPA Zone 1

Located in Douglas County within the Denver Metro area, Larkspur (80118) sits in Colorado's Front Range where granite bedrock and uranium-bearing formations create significant radon potential. Current testing data for this community is limited, making individual home assessment crucial for residents. Given Colorado's status among the highest radon states nationally, homeowners should prioritize professional testing regardless of home age or foundation type.

Larkspur, CO Radon Mitigation

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

Larkspur, CO Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Larkspur Radon Facts

Key details about the radon risk profile for Larkspur and the 80118 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Douglas County, CO

Zip Code

80118

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Larkspur and the 80118 zip code are located in Douglas County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Larkspur, CO

What EPA Radon Zone is Larkspur in?

Larkspur and the 80118 zip code are in Douglas 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.

How much does radon mitigation cost in Larkspur?

Radon mitigation in Larkspur 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 Larkspur?

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.

Most Active Radon Markets in Colorado

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Fairplay	12.00 pCi/L	9
Crested Butte	8.56 pCi/L	9
Denver	6.22 pCi/L	9
Montrose	9.25 pCi/L	8
Gunnison	7.38 pCi/L	8
Buena Vista	12.57 pCi/L	7
Pueblo	10.67 pCi/L	6
Grand Junction	8.17 pCi/L	6
Bayfield	6.00 pCi/L	6
Canon City	10.80 pCi/L	5
Aurora	7.40 pCi/L	5
Windsor	7.00 pCi/L	5
Telluride	6.80 pCi/L	5
Parker	5.40 pCi/L	5
Salida	15.50 pCi/L	4
Johnstown	9.50 pCi/L	4
Granby	9.00 pCi/L	4
Longmont	8.00 pCi/L	4
Edwards	6.75 pCi/L	4
Mancos	6.00 pCi/L	4