Protect your health. Test your home.



Schedule a Radon Test from St. Louis Radon

  • Property to be tested

  •  Here's important information you should know about your radon test with St. Louis Radon Test and Mitigation. Please take a few seconds...

    Across the scientific and medical community, it's widely accepted that the potential presence of a radioactive substance like Radon in your home (and the health hazards it can create) is something that should be taken seriously.  And we do. That's why we take the time to get the details right and work with you to make sure we're always giving you the best, most accurate radon testing services you can find anywhere.

    We only use the latest in computerized electronic radon-detection monitor technology that enables us to perform a precise sampling of any radon in your home over a continuous 48-hour period. Samples are recorded once each hour during the test, and the detected level of radon is stored to the monitor's memory. When the test is complete and the device is picked up, we download that data and send you a comprehensive report so you can see all hourly data points in both list and graphic formats, as well as the calculated overall average of radon and important EPA average of any radon level detected.

    In the event that the level of Radon detected in your home exceeds the Action Level recommended by the EPA, we're ready to answer your questions and work with you to provide effective and professional Radon mitigation systems to eliminate the threat from your home.

    "Closed-House Conditions" The majority of the time we spend in our homes throughout the year is under what is called "closed-house conditions".  That means that other than normal entrance and exiting, the doors and windows of your home are shut off to incoming outside air. To get an accurate reading of the amount of radon that could be in your home during these periods, it's important that these closed-house conditions be replicated prior to and during the 48-hour radon test. This assures that an accurate, normal-situation radon level can be measured. Please make sure that all doors, windows and/or any vents to the outside remain closed for at least 12 hours before the test is scheduled to be placed, and that they remain closed during the test period.  Normal entrance and exit to and from the house is OK.

    Testing equipment will usually be picked up on the second business day following placement.  As a rule, tests placed on Monday will be picked up on Wednesday, Tuesday to Thursday, Wednesday to Friday, Thursday to Saturday and Friday to Monday.  In some cases if a test has been initially placed late in the day or a delayed start has to be programmed into the monitor, pickup of the unit may fall to the third day after placement.

      Please select a convenient day and time for your test and we'll do our very best to match your request. If the day or time you want is not available, we'll be in touch within 24 hours with other options. Requests for next business-day service must be submitted no later than 2:00 PM Monday thru Friday.

  • (mm/dd/yyyy)
  • 9:00 AM to 12:00 PM 11:00 AM to 2:00 PM 12:00 PM to 3:00 PM No preference
  • 9:00 AM to 12:00 PM 11:00 AM to 2:00 PM 12:00 PM to 3:00 PM No preference.
  • Homeowner Real Estate Transaction
  •   Homeowners, Real Estate Agents and Home Inspectors: Please select any of the following conditions that may apply to the property and how we can get access to it.

  • OcccupiedVacantStagedNew ConstructionOn SupraOn Combo BoxGarage CodeI Will Hide a KeyAlarmedPets Requiring SupervisionExisting Radon System
  • (mm/dd/yyyy)
  • Does the Listing or Selling Agent need to be notified about this appointment to coordinate or approve the appointment with their client? If so, please provide us with their name and contact information.

  • Homeowners, Real Estate Agents or Home Inspectors: Will there be someone at the test property during the requested time window to allow access to the property, or would someone like to be there for any other reason?

  • Someone will be there for access. No one will be at the property.
  • Please Call Ahead No Call Ahead

    Billing and Payment Information:

    The invoice for our testing services will be emailed to the appropriate email address you give us below at the time the test results are issued. Payments are due on receipt and can be made by personal check to the address shown on your invoice. We also accept American Express, Visa, MasterCard and Discover. We do not take credit card payments online. To pay for your test by credit card now, please contact us at 636-200-2875

    48-Hour Continuous Radon Test Base Price: $125*

    Some testing situations dictate that more than one testing device is deployed for accurate results. Some of the variables include the size of the footprint of the foundation (over 2,000 square feet), existence of a crawl space, construction over concrete slabs or other situations. Please call us with any questions.

     *Outside the St. Louis Metro area, the price is $150. This includes zip codes 63016, 63020, 63028, 63084, 63090, 63332, 63341, 63348, 63349, 63357, 63362, 63369, 63373, 63379.

  •    Homeowners:  If you're scheduling this test for your own use and will be responsible for payment, please check the box below and complete the fields below with your name, results email and phone number. Along with the testing address, this is the information we'll use for sending test results, billing purposes and future contact if necessary.

  • Bill the Homeowner
  • Real Estate Agents, Home Inspectors and Prospective Buyers: If you're a real estate agent, home inspector or other professional who is scheduling on behalf of yourself or a client, or if you are a prospective home buyer not currently living at the test home address, please let us know where to send the test results and who will be responsible for payment. 

  • Send test results and billing to me. Send test results and billing to my client.Send test results to me and my client and billing to my client
  • Thank you for scheduling your radon test with St. Louis Radon Test and Mitigation!


The first step to help ensure the safety of you and your family’s health and safety is to have your home tested for radon. At St. Louis Radon, our professional testers deploy the latest in computerized electronic real-time radon monitoring technology to provide you with a comprehensive report, including a complete visual graph of radon level data points as recorded over a 48-hour sampling period.

Learn More About Testing


If testing indicates levels of radon that require action, our team of engineers and technicians will design and install a custom radon mitigation system to safely and effectively redirect radon and other soil gasses out of your home. We also take additional measures to seal and close other possible breaches in the foundation that could let soil gasses into the through cracks or drain tiles systems.

Learn More About Mitigation

New Construction

With new home construction projects, it is crucial to determine the level of radon that may be present in the soil before the home is built. It’s also critical to have the new home retested for potential radon concentrations immediately following occupancy. We also highly recommend installing an Active Dampness Control System (ADC) with every new build.

Learn More About New Construction