Colfax, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Colfax in?

Colfax is in Guilford County, EPA Zone 3.

Q: How much does radon mitigation cost in Colfax?

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

Guilford County

EPA Zone 3

Positioned in Guilford County within the Greensboro metro area, Colfax sits on Piedmont bedrock formations where granite and metamorphic rocks can produce variable radon conditions. While specific testing data for the 27235 zip code is limited, the geological setting suggests homeowners should consider individual property assessment. The area's suburban housing stock, including both older homes and newer developments, means radon risk can vary significantly throughout different neighborhoods.

Colfax, NC Radon Mitigation

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

Colfax, NC Radon Testing

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

Colfax Radon Facts

Key details about the radon risk profile for Colfax and the 27235 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Guilford County, NC

Zip Code

27235

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Colfax and the 27235 zip code are located in Guilford 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 Colfax, NC

What EPA Radon Zone is Colfax in?

Colfax and the 27235 zip code are in Guilford 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 Colfax?

Radon mitigation in Colfax 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 Colfax?

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 North Carolina

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

City	Avg User Radon Level	Submissions
Murphy	12.83 pCi/L	6
Blowing Rock	10.17 pCi/L	6
Brevard	7.50 pCi/L	4
Cary	5.00 pCi/L	4
Highlands	4.50 pCi/L	4
Mooresville	4.00 pCi/L	4
Banner Elk	9.33 pCi/L	3
Charlotte	7.33 pCi/L	3
Denver	4.33 pCi/L	3
Hendersonville	9.00 pCi/L	2
Wake Forest	4.50 pCi/L	2
Apex	3.50 pCi/L	2
Huntersville	3.50 pCi/L	2
Raleigh	9.00 pCi/L	1
Fayetteville	5.00 pCi/L	1
Waxhaw	4.00 pCi/L	1
Chapel Hill	3.00 pCi/L	1
Clayton	No submissions	0
Fuquay Varina	No submissions	0
Holly Springs	No submissions	0