Wisconsin Radon Levels

by Zip Code:

54928

County of

Shawano

The average (mean) levels are:

1

9.2 pCi/L

The % of tests greater than 4.0 pCi/L:

1

56.8%

The highest radon level is:

1

72.1 pCi/L

The % of tests between 2 & 4 pCi/L:

1

26.4%

***Data is pre-mitigation testing and the average of the last 5 years (2019-2023) of reported data from the Centers for Disease Control and Prevention (CDC). This is the most up to date publicly available radon data. It is reported at the county level. Therefore, the radon levels by zip code search resolves to the primary county reporting data.

Your county average radon levels are:

9.2 pCi/L

This is the equivalent approximate health risk exposure to:

245

Chest X-Rays per year

2 3

18

Cigarettes smoked per day

428

Coast to coast flights per year

2 4

* Calculations according to radiology and international health agency sources listed under Sources and Citations.

About Radon + Recommendations

Radon is a silent, invisible, and odorless radioactive gas. Formed from the natural decay of uranium in soil, rock, and water, radon gas can seep into homes through various entry points, accumulating and posing a health risk. It is the leading cause of lung cancer for non-smokers.

All world health agencies place radon in their top classifications for known carcinogens (cancer causing agents). Their recommendations for radon testing and radon mitigation is as follows:

For any building testing greater than 4.0 pCi/L (picocuries per liter) the Environmental Protection Agency (EPA) recommends mitigation.
For any building testing between 2.0 - 4.0 pCi/L the EPA suggests considering mitigation.
The World Health Organization (WHO) recommends radon mitigation if results are at or above 2.7 pCi/L.
The Department of Health Services (DHS) in Wisconsin has designated 17 radon information centers around the state where you can talk to agency health experts or get single reading low cost radon test kits.
Radon gas levels can vary significantly from one building to another. According to the US Surgeon General's Office the only way to know your radon levels is to test.
Radon gas is the largest single contributor to the average person's annual radiation exposure.

CDC average (mean) reporting in 2023

I'm interested in radon testing or radon mitigation in WI. Where do I start?

The EPA and DHS in Wisconsin both recommend homeowners locate a certified professional to perform your radon testing and radon mitigation installation services. You can find certified pros on NRPP. All PureTech Home Services technicians are fully certified in radon testing and radon mitigation services.

Professionals will typically use a continuous radon monitor to provide a minimum of a 48-hour test with hourly readings. Or you may purchase low cost radon test devices that provide a maximum detected reading over your testing period. Again WI DHS lists resources for these radon tests. These lower cost charcoal or liquid scintillation devices typically require the user to send them in to a lab for analysis and reporting.

How often should I test for radon?

First, some important points to be aware of regarding radon gas levels and testing recommendations:

Longer test periods provide a more accurate representation of average radon gas levels
Radon gas levels change over time due to all sorts of variables (weather and seasonality, soil composition, completing renovations, changes in ventilation or HVAC components, etc)
No home or construction 'type' is immune to high levels of radon gas. Any home regardless of age of construction can have high radon concentrations.
Testing in colder months often reveal high radon gas concentrations due to pressurization differences between the outside and inside of the home, and higher likelihood of adherence to closed home conditions (closed windows and doors) in colder months.

Pre-mitigation radon testing - When to test?

If you have never tested
Every 2-5 years
As of 2025, radon testing is not required for real estate transactions. However, DHS does encourage home buyers test when buying a new home.
Renovations or changes to ventilation and HVAC
You've finished or will occupy a lower level than previously tested

Post-mitigation radon testing

Plan to test at least every two years to ensure your radon mitigation system is maintaining reduced radon gas levels. Also plan to test upon the pre-mitigation conditions listed above when making renovations or altering HVAC.

PSA for those with radon mitigation systems already:

Ensure your radon mitigation fan is operational at least every week. You can do this by simply checking your 'U-Tube' device located on the PVC pipe of the radon system.

The U-tube fluid should be uneven. If it's even that means the fan isn't pulling from beneath the slab as desired, or has malfunctioned. Some contractors may use electronic devices to monitor as well.

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