Mendham, NJ Radon Mitigation and Testing

Q: What is the average radon level in Mendham, NJ?

Based on 2 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Mendham in?

Mendham is in Morris County, EPA Zone 1.

Q: How much does radon mitigation cost in Mendham?

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

Avg: 5.00 pCi/L

Morris County

EPA Zone 1

2 user tests

Nestled in Morris County within the New York City metro area, Mendham has recorded an average radon level of 5.0 pCi/L, which exceeds the EPA action level of 4.0 pCi/L. The community sits in EPA Zone 1, reflecting high radon potential due to the region's granite bedrock and glacial deposits. Homeowners in zip code 07945 should prioritize radon testing and mitigation, especially in properties with basements or lower-level living areas.

5.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Mendham, NJ. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Mendham, NJ Radon Mitigation

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

Mendham, NJ Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Mendham, New Jersey Radon Levels

User-submitted radon test readings from homes in the Mendham area.

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Mendham, NJ	100+ Years	Partial Basement	Oct 2020

Have a radon test result for Mendham? Submit your reading to help other homeowners.

Mendham Radon Facts

Key details about the radon risk profile for Mendham and the 07945 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Morris County, NJ

Zip Code

07945

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Mendham and the 07945 zip code are located in Morris County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Mendham, NJ

What is the average radon level in Mendham, NJ?

Based on 2 user-submitted tests, the average radon level in Mendham is 5.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Mendham in?

Mendham and the 07945 zip code are in Morris 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.

How much does radon mitigation cost in Mendham?

Radon mitigation in Mendham 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 Mendham?

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.

Most Active Radon Markets in New Jersey

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Cherry Hill	6.44 pCi/L	9
Hillsborough	6.14 pCi/L	7
Freehold	10.50 pCi/L	6
Marlboro	6.17 pCi/L	6
Bernardsville	7.00 pCi/L	5
Phillipsburg	7.00 pCi/L	5
Edison	5.60 pCi/L	5
Princeton	5.40 pCi/L	5
Sussex	9.75 pCi/L	4
Piscataway	6.75 pCi/L	4
Caldwell	5.00 pCi/L	4
Atlantic Highlands	4.75 pCi/L	4
West Orange	4.00 pCi/L	4
Basking Ridge	3.75 pCi/L	4
Hackettstown	3.75 pCi/L	4
Livingston	3.25 pCi/L	4
Nutley	3.25 pCi/L	4
Sicklerville	7.00 pCi/L	3
Clifton	6.00 pCi/L	3
Westfield	6.00 pCi/L	3