Durham, NH Radon Mitigation and Testing

Q: What is the average radon level in Durham, NH?

Based on 2 user-submitted tests, the average radon level is 10.50 pCi/L.

Q: What EPA Radon Zone is Durham in?

Durham is in Strafford County, EPA Zone 2.

Q: How much does radon mitigation cost in Durham?

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

Avg: 10.50 pCi/L

Strafford County

EPA Zone 2

2 user tests

Durham in Strafford County shows an average radon level of 10.5 pCi/L based on local testing data, significantly exceeding the EPA's 4.0 pCi/L action threshold. This university town, part of the greater Boston metropolitan area, sits atop New Hampshire's granite bedrock, which naturally produces elevated radon levels in many homes. The area's mix of historic and modern housing, often featuring full basements, creates ideal conditions for radon accumulation.

10.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Durham, NH. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Durham, NH Radon Mitigation

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

Durham, NH Radon Testing

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

Durham, New Hampshire Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Durham, NH	—	Full Basement	Aug 2020
11 pCi/L	Durham, NH	21-50 Years	Full Basement	May 2016

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

Durham Radon Facts

Key details about the radon risk profile for Durham and the 03824 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Strafford County, NH

Zip Code

03824

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

10.50 pCi/L

User Tests Submitted

Durham and the 03824 zip code are located in Strafford 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 Durham, NH

What is the average radon level in Durham, NH?

Based on 2 user-submitted tests, the average radon level in Durham is 10.50 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 Durham in?

Durham and the 03824 zip code are in Strafford 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 Durham?

Radon mitigation in Durham 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 Durham?

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 New Hampshire

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

City	Avg User Radon Level	Submissions
Tamworth	12.67 pCi/L	6
Freedom	10.75 pCi/L	4