Calais, VT Radon Mitigation and Testing

Q: What EPA Radon Zone is Calais in?

Calais is in Washington County, EPA Zone 2.

Q: How much does radon mitigation cost in Calais?

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

Washington County

EPA Zone 2

This small community in central Washington County sits on metamorphic bedrock formations typical of Vermont's Green Mountain region. With limited radon testing data available for zip code 05648, homeowners in Calais face uncertainty about their indoor air quality. Vermont's granite-rich geology can produce elevated radon levels, making individual home testing particularly important for establishing safe living conditions.

Calais, VT Radon Mitigation

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

Calais, VT Radon Testing

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

Calais Radon Facts

Key details about the radon risk profile for Calais and the 05648 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Washington County, VT

Zip Code

05648

Predicted Screening Level

2–4 pCi/L (Zone 2)

Calais and the 05648 zip code are located in Washington 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 Calais, VT

What EPA Radon Zone is Calais in?

Calais and the 05648 zip code are in Washington 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 Calais?

Radon mitigation in Calais 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 Calais?

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 Vermont

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

City	Avg User Radon Level	Submissions
Stowe	13.00 pCi/L	2
Wilmington	8.50 pCi/L	2