Radon is a colorless, odorless, tasteless, radioactive gas that occurs naturally in soil gas, underground water, and outdoor air. When too much radon enters a home it can be a health hazard. If potentially hazardous levels of radon are found in a home, they can be reduced by various remediation or reduction procedures.

New Jersey recommends that every homeowner test their home for the presence of radon and has passed laws to regulate the sale of homes contaminated by radon. The Department of Environmental Protection (DEP) regulates the testing and cleanup of radon. The DEP also educates the public on the dangers of radon and ways to prevent harm from radon.

• When buying or selling a home that has been tested for radon, the seller must give a copy of the test results and evidence of any treatment or cleanup efforts.
  
• When the DEP tests a home for radon, they must provide the homeowner with a certificate stating that the home had acceptable amounts of radon.
  
• If radon is found in a home and removal efforts were made, the DEP must provide the homeowner with a certificate stating that after the removal or remediation project, radon levels in the home were within acceptable limits.