Granite, CO Radon Mitigation and Testing

Q: What EPA Radon Zone is Granite in?

Granite is in Lake County, EPA Zone 1.

Q: How much does radon mitigation cost in Granite?

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

Lake County

EPA Zone 1

High in the Colorado Rockies within Lake County, Granite sits at extreme elevation where uranium-bearing granite bedrock creates significant radon potential. With limited testing data available for zip code 81228, homeowners should prioritize radon testing given the geological conditions. Mountain communities often see elevated readings due to the combination of granite geology and the building practices needed for high-altitude construction.

Granite, CO Radon Mitigation

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

Granite, CO Radon Testing

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

Granite Radon Facts

Key details about the radon risk profile for Granite and the 81228 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lake County, CO

Zip Code

81228

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Granite and the 81228 zip code are located in Lake 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 Granite, CO

What EPA Radon Zone is Granite in?

Granite and the 81228 zip code are in Lake 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 Granite?

Radon mitigation in Granite 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 Granite?

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