Colfax, NC Radon Levels

Q: What EPA Radon Zone is Colfax in?

Colfax is in Guilford County, EPA Zone 3.

Q: Why are radon readings shown from areas near Colfax?

No homeowner radon tests have been submitted for Colfax yet, so readings from the closest cities and the Guilford County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

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.

Check local Colfax radon levels and find certified testing and mitigation professionals to keep your home safe

Colfax, NC Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Guilford County, NC

Zip Code 27235

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.

6.00

pCi/L area average

Above EPA Action Level

Guilford County average: 6.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Colfax itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Colfax, NC Radon Mitigation

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

Need Radon Mitigation or Testing in Colfax?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Guilford County Pros

1-800-299-3578 336-218-6344 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Colfax, NC

No homeowner tests have been submitted for Colfax yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Winston Salem	13.8 mi	6.33 pCi/L	3
Walnut Cove	17.0 mi	12.00 pCi/L	1
Clemmons	22.0 mi	4.00 pCi/L	2
King	23.5 mi	3.00 pCi/L	1
Gibsonville	24.7 mi	6.00 pCi/L	1
Asheboro	30.5 mi	5.00 pCi/L	2
Pilot Mountain	34.4 mi	14.00 pCi/L	1
Yanceyville	42.1 mi	4.00 pCi/L	1

Guilford County Radon Profile

Guilford County is classified as EPA Radon Zone 3, the lowest predicted-risk tier, with modeled indoor screening averages below 2 pCi/L. Homeowner-submitted tests from 1 city in Guilford County average 6.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Guilford County.

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.

Why are radon readings shown from areas near Colfax?

No homeowner radon tests have been submitted for Colfax yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Guilford County average—are the best available indicator of local conditions until Colfax homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

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.