Millis, MA Radon Levels

Q: What EPA Radon Zone is Millis in?

Millis is in Norfolk County, EPA Zone 2.

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

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

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

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

Millis, MA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Norfolk County, MA

Zip Code 02054

Southwest of Boston in Norfolk County, Millis sits within the Boston Metro region where glacial till deposits over granite bedrock contribute to moderate radon potential across southeastern Massachusetts. The community features predominantly mid-20th century residential development with many properties having full basements typical of New England construction. Since comprehensive radon testing data isn't available for zip code 02054, residents should conduct testing to establish their individual risk profiles.

8.08

pCi/L area average

Above EPA Action Level

Norfolk County average: 8.08 pCi/L, based on 25 user-submitted tests across 17 cities in the county. No homeowner readings have been submitted for Millis 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+

Millis, 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 Millis, MA

No homeowner tests have been submitted for Millis 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
Norfolk	3.8 mi	4.00 pCi/L	1
Holliston	4.6 mi	4.00 pCi/L	1
Franklin	5.6 mi	9.00 pCi/L	2
Ashland	7.8 mi	5.33 pCi/L	3
Norwood	8.2 mi	5.00 pCi/L	1
Natick	8.3 mi	4.50 pCi/L	2
Westwood	8.4 mi	5.00 pCi/L	1
Milford	8.6 mi	5.00 pCi/L	2

Norfolk County Radon Profile

The soils and bedrock of Norfolk County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 17 cities in Norfolk County average 8.08 pCi/L across 25 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Norfolk County to test, as levels can differ between neighboring homes.

Radon FAQ for Millis, MA

What EPA Radon Zone is Millis in?

Millis and the 02054 zip code are in Norfolk 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.

Why are radon readings shown from areas near Millis?

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

Radon mitigation in Millis 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 Millis?

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.