1. Introduction
Radon is a silent and invisible health hazard that can be present in any home—new or old, well-sealed or drafty, basement or no basement. Milwaukee residents are increasingly becoming aware of the risks associated with radon gas and the importance of regular testing. This comprehensive guide will provide everything homeowners in radon testing guide Milwaukee need to know about radon testing—from understanding what radon is to how to test for it and mitigate elevated levels.
2. What is Radon?
Radon is a naturally occurring radioactive gas that is released from the decay of uranium found in soil, rock, and water. It is colorless, tasteless, and odorless, making it impossible to detect without specialized equipment. When radon gas escapes from the ground into the air, it can enter homes through cracks and openings in the foundation.
3. Why Radon is a Concern in Milwaukee
Milwaukee and the surrounding counties sit on geological formations that can release significant amounts of radon gas. According to the Wisconsin Department of Health Services, one in every 10 homes in Wisconsin has elevated levels of radon. The risk in Milwaukee is notably higher due to the soil composition and the prevalence of basements, which can trap radon gas indoors.
4. Health Effects of Radon Exposure
Radon is the second leading cause of lung cancer in the United States after smoking. The U.S. Environmental Protection Agency (EPA) estimates that radon causes about 21,000 lung cancer deaths each year. Long-term exposure to high levels of radon can significantly increase your risk, especially for smokers or former smokers.
Key Symptoms of Radon Exposure (from prolonged exposure):
- Persistent cough
- Shortness of breath
- Wheezing
- Coughing up blood
- Chest pain
- Frequent respiratory infections
These symptoms often only appear after serious health issues have developed, making preventative testing crucial.
5. How Radon Enters Homes
Radon gas travels from the soil into homes through:
- Cracks in the foundation
- Construction joints
- Gaps in floors and walls
- Gaps around pipes and wires
- Sump pump openings
- Crawlspaces
Once inside, radon can accumulate to dangerous levels, especially in poorly ventilated areas.
6. Radon Levels in Wisconsin: The Data
According to state-wide surveys and geological assessments:
- Milwaukee County has medium to high radon potential.
- Up to 30% of tested homes in some Milwaukee neighborhoods have radon levels above the EPA action level of 4.0 pCi/L.
- Radon levels can vary significantly from house to house, even within the same block.
7. Testing for Radon: A Complete Overview
Testing is the only way to know if radon is a problem in your home. Fortunately, testing is easy, affordable, and widely available.
There are two main ways to test:
- DIY Radon Test Kits – Available online or at hardware stores.
- Professional Testing Services – Ideal for real estate transactions or detailed measurements.
8. Types of Radon Tests
Short-Term Tests
- Duration: 2 to 7 days
- Ideal for initial screening
- Types: Activated charcoal kits, liquid scintillation detectors
- Best performed in winter months when homes are sealed
Long-Term Tests
- Duration: 90 days to 1 year
- Provide more accurate readings
- Recommended if short-term test is borderline (2–4 pCi/L)
Continuous Radon Monitors (CRMs)
- Used by professionals
- Provide hourly readings
- Great for time-sensitive decisions like home sales
9. Where and How to Place Radon Test Kits
Placement is critical for accuracy. Follow these tips:
- Place in the lowest livable level of the home
- Keep test kits away from windows, vents, and high-humidity areas
- Avoid kitchens and bathrooms
- Place at breathing height (2-6 feet above floor)
- Close windows and doors 12 hours before and during the test
- Do not disturb the kit during testing
10. Professional Radon Testing in Milwaukee
If you prefer certified expertise or need official documentation (such as during a home sale), hiring a professional radon tester is a smart option.
Certification Bodies
- National Radon Proficiency Program (NRPP)
- National Radon Safety Board (NRSB)
What to Expect
- Professional evaluation of home layout
- Use of high-accuracy continuous monitors
- Testing typically takes 48–96 hours
- You’ll receive a detailed report with graphs and interpretation
11. Interpreting Radon Test Results
| Radon Level (pCi/L) | Action |
|---|---|
| 0 – 1.9 | Safe, no action needed |
| 2 – 3.9 | Consider long-term testing |
| 4.0 or higher | EPA recommends mitigation |
Even levels between 2.0–3.9 pCi/L can pose health risks over time. The World Health Organization recommends action above 2.7 pCi/L.
12. What to Do if Radon Levels Are High
If your test shows levels at or above 4.0 pCi/L:
- Schedule a confirmatory test (preferably long-term)
- Contact a certified radon mitigation contractor
- Do not panic—radon mitigation is highly effective