Nantucket, MA Radon Levels

Q: What EPA Radon Zone is Nantucket in?

Nantucket is in Nantucket County, EPA Zone 2.

Q: How much does radon mitigation cost in Nantucket?

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

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

Nantucket, MA Radon Facts

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

County Nantucket County, MA

Zip Code 02554

This historic island community in Nantucket County features sandy glacial deposits over bedrock that generally produce moderate radon levels. While comprehensive testing data for the 02554 zip code area remains limited, the unique island geology and prevalence of older homes with various foundation types make radon testing advisable for residents.

6.80

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.80 pCi/L, based on 10 tests from 6 nearby cities. No readings have been submitted for Nantucket yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Nantucket, 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 Nantucket, MA

No homeowner tests have been submitted for Nantucket 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
Osterville	28.9 mi	6.00 pCi/L	1
Mashpee	31.3 mi	5.00 pCi/L	4
Falmouth	34.0 mi	7.00 pCi/L	1
Sandwich	36.3 mi	10.00 pCi/L	1
North Falmouth	37.5 mi	6.00 pCi/L	1
Buzzards Bay	38.5 mi	9.50 pCi/L	2

Nantucket County Radon Profile

The soils and bedrock of Nantucket County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Few homeowner tests have been logged inside Nantucket County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Nantucket County to test, as levels can differ between neighboring homes.

Radon FAQ for Nantucket, MA

What EPA Radon Zone is Nantucket in?

Nantucket and the 02554 zip code are in Nantucket 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 Nantucket?

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

Radon mitigation in Nantucket 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 Nantucket?

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.