Chelsea, MA Radon Levels

Q: What EPA Radon Zone is Chelsea in?

Chelsea is in Suffolk County, EPA Zone 3.

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

No homeowner radon tests have been submitted for Chelsea yet, so readings from the closest cities and the Suffolk 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 Chelsea?

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

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

Chelsea, MA Radon Facts

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

County Suffolk County, MA

Zip Code 02150

This densely populated Suffolk County community within the Boston Metro area currently lacks comprehensive radon testing data for zip code 02150. Chelsea's urban setting with predominantly older housing stock and varied foundation types creates uncertain radon conditions. Professional testing remains essential for residents, particularly those in basement apartments or older buildings where radon accumulation is more likely.

6.00

pCi/L area average

Above EPA Action Level

Suffolk 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 Chelsea 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+

Chelsea, MA 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 Chelsea?

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Radon Readings Near Chelsea, MA

No homeowner tests have been submitted for Chelsea 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
Everett	1.4 mi	4.50 pCi/L	2
Malden	2.7 mi	5.00 pCi/L	2
Somerville	3.8 mi	4.50 pCi/L	4
Medford	4.1 mi	8.00 pCi/L	3
Melrose	4.5 mi	5.00 pCi/L	3
Saugus	4.8 mi	5.00 pCi/L	1
Lynn	6.5 mi	4.00 pCi/L	1
Stoneham	6.8 mi	9.67 pCi/L	3

Suffolk County Radon Profile

Suffolk 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 Suffolk 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 Suffolk County.

Radon FAQ for Chelsea, MA

What EPA Radon Zone is Chelsea in?

Chelsea and the 02150 zip code are in Suffolk 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 Chelsea?

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

Radon mitigation in Chelsea 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 Chelsea?

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.