Antonito, CO Radon Mitigation and Testing

Q: What EPA Radon Zone is Antonito in?

Antonito is in Conejos County, EPA Zone 2.

Q: How much does radon mitigation cost in Antonito?

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

Conejos County

EPA Zone 2

Located in the San Luis Valley within Conejos County, Antonito sits at high elevation where volcanic and sedimentary geology creates a complex underground environment. This historic railroad town in zip code 81120 features a mix of older adobe and frame construction typical of southern Colorado communities. Given the absence of current testing data and the area's unique geological setting, homeowners should consider professional radon testing to establish baseline levels.

Antonito, CO Radon Mitigation

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

Antonito, CO Radon Testing

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

Antonito Radon Facts

Key details about the radon risk profile for Antonito and the 81120 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Conejos County, CO

Zip Code

81120

Predicted Screening Level

2–4 pCi/L (Zone 2)

Antonito and the 81120 zip code are located in Conejos County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Antonito, CO

What EPA Radon Zone is Antonito in?

Antonito and the 81120 zip code are in Conejos County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Antonito?

Radon mitigation in Antonito 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 Antonito?

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