Everything Milwaukee Homeowners Need to Know About Testing for Radon

Milwaukee’s vibrant neighborhoods, beautiful lakeshore, and historical architecture make it a great place to call home. But with Wisconsin’s unique geology and housing stock, local homeowners face important questions about indoor air quality—especially when it comes to radon. If you’ve ever wondered how to test your home for radon, this guide covers everything you need to know, specifically for Milwaukee residents.

What is Radon and Why Should Milwaukee Residents Care?

Radon is a naturally occurring radioactive gas that comes from the breakdown of uranium in the soil. It is invisible, odorless, and tasteless, making it impossible to detect without specialized testing. In Wisconsin—and especially in the Milwaukee region—radon levels tend to be elevated due to the glacial soil under many homes. Prolonged exposure to high radon levels significantly increases the risk of lung cancer, even for non-smokers.

Understanding the Radon Risks in Milwaukee Homes

Milwaukee’s mix of historical bungalows, mid-century ranches, and new builds means radon can affect homes of any age, style, or neighborhood—including Shorewood, Bay View, and the North Shore suburbs. Ground freezing and thawing cycles during our long Wisconsin winters can influence radon infiltration. Additionally, radon levels can spike with increased home heating or energy efficiency improvements, because less air leaves and enters the house naturally.

When Should You Test for Radon in Milwaukee?

You should test your home for radon in the following scenarios:

• Every two years as part of your regular home maintenance routine
• When buying or selling a home—testing is recommended (and sometimes required) during real estate transactions in Wisconsin
• After major renovations, especially those affecting your basement or foundation
• If you’ve added new insulation or energy-efficient windows
• After installing a radon mitigation system, to ensure ongoing safety

How to Test for Radon in Milwaukee: Step-by-Step

There are two primary ways homeowners in Milwaukee can test for radon: with DIY kits or through professional testing services.

1. Using a DIY Radon Test Kit

DIY test kits are reliable, affordable, and readily available at local hardware stores like Bliffert Lumber & Hardware or Menards, and through your local health department.

Follow these steps for best results:

• Choose a short-term test (2-7 days) for a quick reading, or a long-term test (90 days to 1 year) for more accurate average results.
• Pick a testing location—typically the lowest livable area of the house, such as the basement or first floor, since radon rises from the ground.
• Place the test kit at least 20 inches above the floor and away from windows, exterior walls, drafts, or sources of humidity (such as bathrooms or kitchens).
• Keep windows and exterior doors closed as much as possible for at least 12 hours before and throughout the test period.
• After the testing period, securely seal the kit and promptly mail it to the lab (per the kit instructions) for analysis.
• Wait for your results, which usually arrive in one to two weeks.

2. Hiring a Professional Radon Tester

For added peace of mind, especially during real estate transactions or if you want precise, documented results, many Milwaukee residents opt for professional testing. Certified radon measurement professionals use advanced equipment and can identify radon entry points more comprehensively than DIY kits.

To find a qualified expert:

• Seek out state-certified professionals via the Wisconsin Department of Health Services or the National Radon Proficiency Program.
• Ask for references and ensure the tester is familiar with homes in your area of Milwaukee.

Interpreting Your Radon Test Results

Radon test results are measured in picocuries per liter (pCi/L). The EPA recommends mitigation if your home’s radon level is 4.0 pCi/L or higher. However, even lower levels carry some risk, and Milwaukee’s average home often tests above the national average.

If your results are:

• Below 2.0 pCi/L: Low risk. Test again every 2 years or if your home undergoes major changes.
• Between 2.0–4.0 pCi/L: Consider mitigation for additional safety, especially if you spend a lot of time in the basement.
• Above 4.0 pCi/L: Immediate action is recommended. Consult a Milwaukee-based radon mitigation specialist.

Why Testing Matters in Milwaukee’s Local Context

Milwaukee’s seasonal extremes mean most of us spend months with our houses closed up tight. Winter heating, spring rains, and fall windstorms all affect indoor air pressures and can pull radon inside. Milwaukee also features older homes with stone or brick foundations—and these often have more cracks and gaps for radon to enter. Don’t let the historic charm of your Bay View bungalow or East Side duplex lull you into a false sense of security; testing is the only way to know your risk.

Making Radon Testing Part of the Milwaukee Homeowner’s Routine

With all the home improvement and maintenance tasks on your “to-do” list, it’s easy to put off radon testing. But consider this: Radon is the leading cause of lung cancer among non-smokers in the U.S., and testing is both simple and inexpensive. To keep your home and family safe:

• Add radon testing to your spring or fall home maintenance checklist
• Schedule a test before sealing up your home for the winter
• Share your results with neighbors and encourage widespread testing in your community—radon exposure is a risk that anyone in southeastern Wisconsin can face

Final Thoughts: Take Action Today for Peace of Mind Tomorrow

Testing your home for radon is one of the most important steps you can take to protect your family’s health in Milwaukee. Whether you live near Lake Michigan or further inland, high radon levels don’t discriminate. By following the steps in this guide, you can confidently navigate your testing options and create a healthier living environment for your household.

For more information, Milwaukee residents can consult resources like the Wisconsin Department of Health Services or the EPA. Don’t wait—radon is one home hazard you can’t see or smell, but you can absolutely control with regular testing and mitigation if necessary.