Williston, VT Radon Mitigation and Testing

Q: What is the average radon level in Williston, VT?

Based on 1 user-submitted tests, the average radon level is 18.00 pCi/L.

Q: What EPA Radon Zone is Williston in?

Williston is in Chittenden County, EPA Zone 3.

Q: How much does radon mitigation cost in Williston?

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

Avg: 18.00 pCi/L

Chittenden County

EPA Zone 3

1 user test

Nestled in Chittenden County within Vermont's Champlain Valley, Williston sits on glacial lake sediments that can contribute to elevated indoor radon levels. Local testing has recorded an average reading of 18.0 pCi/L, which significantly exceeds the EPA action level of 4.0 pCi/L. Given the region's geological conditions and the town's mix of newer suburban homes with full basements, all Williston residents should prioritize professional radon testing.

18.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Williston, VT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Williston, VT Radon Mitigation

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

Williston, VT Radon Testing

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

Williston, Vermont Radon Levels

User-submitted radon test readings from homes in the Williston area.

Radon Level	City	Home Age	Foundation	Submitted
18 pCi/L	Williston, VT	0-20 Years	Full Basement	Oct 2018

Have a radon test result for Williston? Submit your reading to help other homeowners.

Williston Radon Facts

Key details about the radon risk profile for Williston and the 05495 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Chittenden County, VT

Zip Code

05495

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

18.00 pCi/L

User Tests Submitted

Williston and the 05495 zip code are located in Chittenden County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Williston, VT

What is the average radon level in Williston, VT?

Based on 1 user-submitted test, the average radon level in Williston is 18.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Williston in?

Williston and the 05495 zip code are in Chittenden County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Williston?

Radon mitigation in Williston 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 Williston?

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