Radon is a colorless, odorless, tasteless radioactive gas. It forms naturally when radioactive metals like uranium, thorium, and radium break down in rocks, soil, and groundwater. It can be harmless when it disperses outdoors, but it can build up inside your home without you knowing. Long-term exposure to radon can increase your risk of lung cancer.
Radon testing in New Baltimore, MI, matters because roughly 25% of homes may have elevated radon levels. Local homes vary widely in age, foundation type, basement use, and sump systems, all of which can affect how soil gases enter a property. A low radon result in one New Baltimore home does not mean a nearby home will have the same result. Local homes vary widely in age, foundation type, basement use, and sump systems, all of which can affect how soil gases enter a property. A low radon result in one New Baltimore home does not mean a nearby home will have the same result.
If you're buying a home in New Baltimore, Chesterfield Township, New Haven, or another nearby Macomb County community, this guide explains what to look for during radon testing so you can make a more informed decision.
Why Is Radon Higher in New Baltimore Homes?
Radon levels here come down to three main factors, all tied to what's happening underground.
Glacial and Bedrock Geology
The soil under New Baltimore homes naturally contains radioactive elements like uranium and radium. These break down slowly over millions of years, and radon gas is produced along the way. Southeast Michigan also has certain geological formations, some extending across parts of Macomb County, that contain uranium-bearing materials.
Soil Permeability and Groundwater
Radon moves upward along the path of least resistance, so loose, porous soil makes it easier for the gas to reach the surface. It can also dissolve in groundwater. If you're in an older New Baltimore home that uses well water, that dissolved radon can be released into your indoor air whenever you run the water.
The Stack Effect
During winters in New Baltimore, many homes stay tightly sealed for months. When a house is heated, warm air rises and escapes through openings in the upper levels. That creates a slight vacuum in the basement or crawl space, known as the stack effect. The pressure difference can pull radon from the surrounding soil into your home through foundation cracks, sump pits, structural gaps, and porous concrete blocks.
Disclaimer: Geological maps and regional trends only tell part of the story. Radon levels can differ significantly between homes in New Baltimore, including properties near Washington Street and Clay Street, depending on the soil under the property, the condition of the foundation, ventilation, and how the home was built.
Comparison of Radon Levels Across Michigan
Macomb County is generally considered to have lower radon potential than many other Michigan counties. The EPA places it in Zone 3, which means the predicted average indoor radon screening level is below 2.0 pCi/L.
As per Michigan government, 1 in 4 Michigan homes (25%) may have radon levels at or above 4.0 pCi/L, which is the EPA's action threshold. Local data can look different from state estimates, though, and county officials have reported elevated radon in some Macomb County homes.
Much of this variation traces back to geology and glacial deposits. Western and southern Michigan hold varying amounts of uranium- and radium-bearing rock and sediment. Macomb County, on the other hand, has lots of lake-bed clay, sand, and other glacial deposits that may affect how soil gases make their way to the surface.
Why a Radon Test in New Baltimore Is Worth It
Each year in Michigan, over 8000 cases of lung cancer are registered out of which 27.2% of cases are diagnosed at an early stage, and around 20.2% of people have to go through low-dose CT screenings.
Since you can't see, smell, or taste radon, testing is the only reliable way to know how much is in your home's air. It also gives you a clearer picture of your potential long-term exposure. Here are a few reasons to test before you buy in New Baltimore.
High Water Table and Sump Pump Systems
New Baltimore sits close to Anchor Bay and Lake St. Clair, so many homes use sump pump systems to manage groundwater and keep basements dry. A sump pit is an opening cut through the basement floor into the soil below. If it isn't properly sealed, soil gases like radon can use it as a pathway into your home.
An open sump pit lets radon slip past parts of the concrete foundation and into the basement air more easily. Sealing it properly, and testing, can show whether this is where radon is getting in.
Finished Basements
Many newer homes in Woodland Meadows, Forest View Estates, and Pine Crest Estates have full-size basements. Families often turn them into family rooms, home offices, gyms, or play areas.
Radon typically enters at the lowest level of a home, so if you spend a lot of time in a finished basement, your exposure could be higher when radon levels are elevated. That makes testing especially important when the lower level is part of your everyday living space.
Lung Cancer Prevention
Because it's invisible and odorless, people can be exposed for years without any obvious warning signs. Testing lets you find out if levels are high and take steps to bring them down.
Radon is the leading cause of lung cancer among non-smokers in the United States, and thousands of deaths each year are linked to long-term exposure. Over 21,000 people each year die due to the long exposure of radon gas in the US.
Radon Mitigation Methods
A radon mitigation system can significantly lower the radon levels in your home by keeping the gas from building up in your living spaces. Here are the most common approaches.
Active Soil Depressurization
A certified professional runs a PVC pipe through the foundation floor and into the soil underneath. An inline radon fan, installed outside the living space, is connected to the pipe and creates continuous suction beneath the foundation.
That suction pulls radon from under the home before it can get inside. The gas is then vented safely outdoors through piping that usually ends above the roofline.
Sub-Slab Depressurization
A professional creates one or more suction points through the concrete slab and connects them to PVC piping. A radon fan, installed outside the living space, creates continuous suction beneath the slab.
That suction pulls radon gas from the soil before it can enter the home. The gas is then carried through the piping and vented safely outdoors, usually above the roofline.
Sub-Membrane Depressurization
This method is typically used in homes with crawl spaces. If the crawl space has exposed dirt or an earthen floor, technicians may cover it with a heavy-duty vapor barrier.
A perforated pipe goes under the membrane and connects to a vent fan. The system draws radon from beneath the plastic barrier and sends it safely outside.
Sump Hole Suction
Some older homes in Downtown New Baltimore and the Anchor Bay Waterfront rely on sump pump systems to manage groundwater.
A professional may install an airtight lid over the sump basin and connect a mitigation pipe to the sealed system. A fan then draws radon from the sump area and vents it outdoors, while the sump pump keeps working under the lid.
Sealing Cracks and Gaps
Sealing visible foundation cracks and gaps is another mitigation step. This includes openings around concrete blocks, utility penetrations, and floor joints.
Sealing can close off some of the ways radon gets in, but it works best as a supporting measure rather than a complete, long-term fix on its own. Radon can still find its way through tiny openings or porous materials.
Energy Recovery Ventilators
In some situations, an Energy Recovery Ventilator (ERV) can help improve indoor air exchange.
An ERV brings controlled outdoor air into your home while exhausting indoor air. This can help dilute indoor radon concentrations, and it recovers some of the energy from the outgoing air, which supports overall energy efficiency.
Radon Testing with WIN Home Inspection in New Baltimore
WIN Home Inspection offers radon testing in New Baltimore, either as an add-on to a home inspection or as a standalone service.
We work with homeowners and buyers across New Baltimore, Chesterfield Township, New Haven, Lenox Township, Richmond, and nearby Anchor Bay communities. Homes in these areas vary widely in age, foundation type, basement use, and sump systems, which is why testing the specific property matters.
Our inspector uses professional equipment and follows established testing procedures, so you get clear, easy-to-understand results. Whether you're buying, selling, or just checking on your current home, a radon test can help you understand what's in your indoor air.
The Bottom Line
Radon is a recognized concern in New Baltimore and across Macomb County. The area may not have the highest radon levels in Michigan, but elevated levels can still show up, and they deserve your attention, especially if you're planning to buy a home.
A radon test measures the concentration of radon in the indoor air during the testing period. It can help you determine whether a home has elevated levels and whether further action or mitigation is worth considering.
A radon test does not measure the amount of uranium in the soil, pinpoint exactly where the gas is entering, or evaluate groundwater, drainage, or flood risk. If elevated levels turn up, a qualified professional can recommend mitigation options that fit the home's construction and foundation.
Next step: If you're buying a home in New Baltimore or nearby Macomb County communities, schedule a radon test during your inspection period. That way, you'll have the results in hand before you make your final decision.
FAQs
1. How long does a radon test take?
Most short-term radon tests take at least 48 hours. The testing device stays in the home during this period to measure radon levels in the indoor air.
2. Can a new home in New Baltimore have radon?
Yes. New homes can have elevated radon levels just like older homes. Home age alone does not determine radon risk, so testing is still recommended.
3. Should I test if my neighbor’s home had a low result?
Yes. Radon levels can vary from one home to another, even on the same street. Your neighbor’s result does not tell you the radon level in your home.
4. Can homes near Lake St. Clair have radon?
Yes. Homes near Lake St. Clair can still have radon. Waterfront location does not determine indoor radon levels, so testing is the only way to know.
5. Can radon testing be added to a home inspection?
Yes. Radon testing can usually be added to a home inspection. It may also be scheduled as a separate service for current homeowners.
6. What happens if my radon level is above 4.0 pCi/L?
The EPA recommends taking action when radon levels are 4.0 pCi/L or higher. A qualified professional can recommend a system to reduce radon, followed by another test to confirm the level has dropped.
