Ayer, MA Radon Levels

Q: What EPA Radon Zone is Ayer in?

Ayer is in Middlesex County, EPA Zone 1.

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

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

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

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

Ayer, MA Radon Facts

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

County Middlesex County, MA

Zip Code 01432

Found in Middlesex County within the Boston Metro area, Ayer sits on glacial deposits and crystalline bedrock common to central Massachusetts, conditions that can produce moderate radon levels. Testing data is currently limited for zip code 01432, emphasizing the importance of individual radon assessment in this historic mill town. The community's mix of 19th-century and modern homes requires tailored approaches to radon evaluation.

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 Ayer 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+

Ayer, 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 Ayer?

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Radon Readings Near Ayer, MA

No homeowner tests have been submitted for Ayer 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
1 pCi/L	Shirley, MA	3.7 mi	0-20 Years	Full Basement	Feb 2026
5 pCi/L	Groton, MA	3.8 mi	21-50 Years	Full Basement	Dec 2023
12 pCi/L	Harvard, MA	4.2 mi	21-50 Years	Full Basement	Jul 2023
3 pCi/L	Littleton, MA	4.8 mi	51-99 Years	Full Basement	Sep 2025
6 pCi/L	Littleton, MA	4.8 mi	100+ Years	Full Basement	Jul 2025
18 pCi/L	Littleton, MA	4.8 mi	21-50 Years	Full Basement	Oct 2022
10 pCi/L	Littleton, MA	4.8 mi	21-50 Years	Full Basement	Aug 2020
4 pCi/L	Westford, MA	7.3 mi	21-50 Years	Partial Basement	Apr 2025

Readings are drawn from the nearest cities with submitted data. Have a result for Ayer? 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 Ayer, MA

What EPA Radon Zone is Ayer in?

Ayer and the 01432 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 Ayer?

No homeowner radon tests have been submitted for Ayer 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 Ayer 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 Ayer?

Radon mitigation in Ayer 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 Ayer?

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 Ayer, MA

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

City	Distance	Avg User Level	Submissions
Shirley	3.7 mi	1.00 pCi/L	1
Groton	3.8 mi	5.00 pCi/L	1
Harvard	4.2 mi	12.00 pCi/L	1
Littleton	4.8 mi	9.40 pCi/L	5
Westford	7.3 mi	12.67 pCi/L	3
Pepperell	7.6 mi	7.00 pCi/L	3
Acton	8.8 mi	20.00 pCi/L	1
Lancaster	9.3 mi	5.00 pCi/L	1