North Chelmsford, MA Radon Levels

Q: What EPA Radon Zone is North Chelmsford in?

North Chelmsford is in Middlesex County, EPA Zone 1.

Q: How much does radon mitigation cost in North Chelmsford?

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

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

North Chelmsford, MA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Middlesex County, MA

Zip Code 01863

Found in Middlesex County within the Boston Metro area, North Chelmsford lies on glacial till deposits over granite and metamorphic bedrock. Limited testing data for zip code 01863 makes professional radon evaluation important for area homeowners. The community's mill town heritage and typical New England foundation styles create potential pathways for radon infiltration in residential properties.

7.28

pCi/L area average

Above EPA Action Level

Middlesex County average: 7.28 pCi/L, based on 90 user-submitted tests across 46 cities in the county. No homeowner readings have been submitted for North Chelmsford 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+

North Chelmsford, MA Radon Mitigation

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

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Radon Readings Near North Chelmsford, MA

No homeowner tests have been submitted for North Chelmsford yet, so the closest user-submitted readings from neighboring communities are shown below. Radon varies by home — testing is the only way to know your level.

Radon Level	City	Distance	Home Age	Foundation	Submitted
3 pCi/L	Tyngsboro, MA	2.9 mi	0-20 Years	Full Basement	Aug 2024
6 pCi/L	Tyngsboro, MA	2.9 mi	21-50 Years	Full Basement	Nov 2020
18 pCi/L	Chelmsford, MA	3.5 mi	51-99 Years	Full Basement	Nov 2025
9 pCi/L	Chelmsford, MA	3.5 mi	51-99 Years	Full Basement	Feb 2021
13 pCi/L	Chelmsford, MA	3.5 mi	21-50 Years	Full Basement	Jan 2016
4 pCi/L	Lowell, MA	3.7 mi	21-50 Years	Full Basement	Jul 2019
2 pCi/L	Lowell, MA	3.7 mi	21-50 Years	Partial Basement	Jul 2017
4 pCi/L	Westford, MA	4.2 mi	21-50 Years	Partial Basement	Apr 2025

Readings are drawn from the nearest cities with submitted data. Have a result for North Chelmsford? Submit your reading to help your neighbors.

Middlesex County Radon Profile

The bedrock and soils beneath Middlesex County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 46 cities in Middlesex County average 7.28 pCi/L across 90 tests — 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 Middlesex County.

Radon FAQ for North Chelmsford, MA

What EPA Radon Zone is North Chelmsford in?

North Chelmsford and the 01863 zip code are in Middlesex County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near North Chelmsford?

No homeowner radon tests have been submitted for North Chelmsford yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Middlesex County average—are the best available indicator of local conditions until North Chelmsford 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 North Chelmsford?

Radon mitigation in North Chelmsford 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 North Chelmsford?

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.

Radon Levels Near North Chelmsford, MA

User-submitted radon levels from the cities closest to North Chelmsford with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Tyngsboro	2.9 mi	4.50 pCi/L	2
Chelmsford	3.5 mi	11.50 pCi/L	4
Lowell	3.7 mi	3.00 pCi/L	2
Westford	4.2 mi	12.67 pCi/L	3
Dracut	4.7 mi	13.00 pCi/L	1
North Billerica	6.5 mi	6.50 pCi/L	2
Littleton	8.2 mi	9.40 pCi/L	5
Groton	8.7 mi	5.00 pCi/L	1