Radon

Icon of radon

Homeowners in New York State can order a radon test from the State Department of Health for $12.25 by completing this order form.

Price includes test kit, analysis and postage to send the test kit to the laboratory.

Be sure to follow all test instructions. It very is important that the home is sealed up and all doors or windows to the outside are closed 24 hours before and during the entire testing period to ensure an accurate test. However, you can leave and re-enter your home.


Environmental Public Health Tracker logo
Track Radon Test Result Data in the Environmental Public Health Tracker. You can view maps, graphs and tables of radon test results in your county.

Radon is the leading cause of lung cancer among nonsmokers. You can’t see, smell or taste it, but radon could be present at a dangerous level in your home.

Radon is a naturally occurring, radioactive gas found in soil and rock that gets into the air you breathe. It seeps into buildings through cracks in the foundation, walls, and joints. It can get into any type of building--homes, offices, and schools. The greatest risk for exposure is where you spend most of your time – usually at home.

How Radon Enters the Home

diagram of house and radon entry points
  1. Cracks in concrete slab
  2. Pores and cracks in concrete blocks
  3. Slab-footing joints
  4. Exposed soil, as in sump
  5. Cracks between poured concrete (slab) and blocks
  6. Loose fitting pipes
  7. Water

Test Your Home for Radon

When to Test

  • Every five years, or every two years if you have a radon mitigation system to make sure it’s working properly.
  • During the winter months when your windows and doors can stay closed 24 hours before and during the entire testing period. However, you can leave and re-enter your home.
  • When buying a home and after major renovations.
  • Within 30 days of installing a radon mitigation system.

Understanding Your Test Results

New York State Health recommends fixing your home if the results of radon tests show levels of 4 picocuries per liter of air (pCi/L) or higher. With today's technology, radon levels in most homes can be reduced to 2 pCi/L or below. You also may want to consider fixing if the level is between 2 and 4 pCi/L.

Find out if radon levels are high in your town.

Fix a Radon Problem

A radon reduction system can reduce radon levels in your home by up to 99% and average cost is about $1,500. If your home has elevated levels of radon, contact a certified radon mitigator. More information is available at the U.S. EPA's Consumer's Guide to Radon Reduction.

Building Homes To Keep Radon Out

New construction methods keep radon out of the home by sealing soil gas entry points, by preventing radon gas from entering the home and by venting to release radon gas outdoors. Installing a radon reduction system during construction is easier and less expensive than installing a system after the house is completed. Every new home should be tested, even if it was built to be radon resistant. If radon levels are still at or above 4 pCi/L, a certified mitigator may activate the system by installing a fan.

More Information

Winning radon poster image

Annual Radon Poster Contest

Congratulations to the 2023-2024 winners of the New York State Department of Health Radon Program's annual radon poster contest. View the winning posters and learn about how students can participate in the 2024-2025 contest.