Radon is one of the most overlooked risks in New Jersey homes, yet it is one of the most serious. Because radon is invisible, odorless, and naturally occurring, many homeowners do not realize it is present until testing is done. Radon testing is a simple step that can make a major difference in protecting your home, your health, and your real estate investment.
In Central New Jersey, where soil composition and building styles can increase radon potential, testing is especially important during a home inspection. Whether you are buying, selling, or already living in your home, understanding radon and how testing works helps you make informed decisions with confidence.
What Is Radon and Why Does It Matter?
Radon is a radioactive gas that forms naturally when uranium breaks down in soil and rock. It moves upward through the ground and can enter homes through foundation cracks, sump pits, crawlspaces, and utility penetrations.
According to health authorities, radon exposure is the second leading cause of lung cancer in the United States and the leading cause among non-smokers. Long-term exposure at elevated levels significantly increases health risk, which is why testing is the only way to know if radon is present at unsafe levels.
In New Jersey, radon is common across many counties, including Middlesex, Somerset, Mercer, and Monmouth.
Why Radon Testing Is Important in New Jersey Homes
New Jersey has some of the highest radon levels in the country due to its geology. Even neighboring homes can have very different radon readings, which means assumptions are unreliable.
Radon testing is especially important in the following situations:
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Buying a home in Central Jersey
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Selling a home and preparing for inspections
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Homes with basements or crawlspaces
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Newly renovated or finished lower levels
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Homes that have never been tested before
Radon testing protects not only your health but also prevents last-minute surprises during real estate transactions.
How Radon Enters Your Home
Radon typically enters through areas where the home contacts the soil, including:
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Cracks in foundation walls or slabs
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Gaps around sump pumps
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Crawlspace floors
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Construction joints
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Utility and plumbing penetrations
Because radon pressure is often higher below the home than inside, the gas is naturally drawn indoors. Newer homes are not immune, as tighter construction can sometimes trap radon more efficiently.
What to Expect During a Radon Test
Radon testing is non-invasive and does not damage your home. During a standard real estate transaction, a short-term test is typically performed over 48 hours.
The Radon Testing Process
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A calibrated radon monitor is placed in the lowest livable level of the home.
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The home must remain under closed-house conditions during the test period.
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The monitor records radon levels continuously.
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Results are analyzed and reported clearly after testing is complete.
At DGM Inspection Services, radon testing is performed following New Jersey and EPA-recommended protocols to ensure accurate and reliable results.
Understanding Your Radon Test Results
Radon levels are measured in picocuries per liter of air (pCi/L).
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Below 2.0 pCi/L: Low risk
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2.0 to 3.9 pCi/L: Moderate, consider mitigation
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4.0 pCi/L or higher: Action recommended
If elevated levels are detected, mitigation systems are highly effective and can significantly reduce radon concentrations.
Radon Testing and Home Inspections
Radon testing is often conducted alongside a full home inspection. This allows buyers and sellers to get a complete picture of the home’s condition, including structural, mechanical, safety, and environmental factors.
A comprehensive inspection may also identify:
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Foundation conditions that contribute to radon entry
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Crawlspace moisture issues
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Ventilation concerns
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Sump pump and drainage effectiveness
Combining radon testing with a home inspection provides valuable context for understanding results and next steps.
Radon Testing for Buyers in Central New Jersey
For buyers, radon testing protects your health and strengthens your negotiating position. Elevated radon levels are common in New Jersey and are usually not a deal-breaker.
If high radon is found, buyers can:
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Request mitigation before closing
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Negotiate credits or repairs
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Move forward with peace of mind once resolved
Testing early helps avoid delays and surprises later in the transaction.
Radon Testing for Sellers Preparing to List
For sellers, proactive radon testing can prevent last-minute issues that slow down or derail a sale.
Benefits include:
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Transparency with buyers
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Faster negotiations
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Opportunity to address issues ahead of time
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Increased buyer confidence
Homes with documented radon mitigation often stand out positively in competitive Central Jersey markets.
Radon Mitigation Basics
If mitigation is needed, a licensed radon contractor typically installs a venting system that redirects radon safely above the roofline.
Most systems:
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Are installed in one day
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Operate quietly
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Require minimal maintenance
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Reduce radon levels by up to 99 percent
Testing after mitigation confirms effectiveness.
Why Choose DGM Inspection Services for Radon Testing
DGM Inspection Services provides professional radon testing as part of its commitment to thorough, unbiased home inspections throughout Central New Jersey.
Clients benefit from:
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Certified radon measurement practices
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Clear, easy-to-understand reports
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Local knowledge of New Jersey housing
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Support for buyers, sellers, and homeowners
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Flexible scheduling
How to Schedule Radon Testing in Central Jersey
If you are buying, selling, or simply want peace of mind, scheduling radon testing is easy.
You can reach DGM Inspection Services by:
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Requesting radon testing as part of a full home inspection
Early testing leads to smoother transactions and safer homes.
Frequently Asked Questions About Radon Testing
What is a safe radon level in New Jersey homes?
There is no completely risk-free radon level, but the EPA recommends action at 4.0 pCi/L or higher. Levels between 2.0 and 3.9 pCi/L may still pose risk over time. Testing is the only way to know your home’s radon level.
How long does a radon test take?
Most real estate radon tests last 48 hours. During this time, the home must remain under closed-house conditions. Results are typically available shortly after the test is completed.
Do new homes need radon testing?
Yes, new homes can have elevated radon levels just like older homes. In some cases, newer construction can trap radon more efficiently due to tighter building envelopes. Testing is recommended regardless of the home’s age.
Can radon levels change over time?
Yes, radon levels can fluctuate due to weather, seasonal changes, and home modifications. Retesting is recommended every few years or after major renovations.
Who is responsible for radon testing during a home sale?
Radon testing is typically requested by the buyer as part of the inspection contingency. However, sellers often test proactively to avoid surprises. Responsibility can be negotiated during the transaction.
Is radon mitigation expensive?
Radon mitigation is generally affordable compared to other home repairs. Costs vary based on the home’s layout, but systems are highly effective and add long-term value and safety.
Final Thoughts
Radon testing is one of the simplest and most impactful steps you can take to protect your New Jersey home. Whether you are buying, selling, or staying put, understanding radon risk and addressing it early leads to healthier living and smoother real estate transactions.
If you are in Central Jersey and want reliable, professional radon testing, DGM Inspection Services is ready to help.