Radon Testing on Long Island: Should You Be Concerned?

Radon is a colorless, odorless gas that forms naturally from uranium decay in soil. It’s the second leading cause of lung cancer in the United States — and Long Island has elevated radon levels in many areas.

Long Island’s Radon Risk

Nassau and Suffolk County both have zones where elevated radon is common. Certain soil compositions — particularly in northern parts of both counties — allow radon to accumulate in basements and lower levels of homes.

How Testing Works

Radon testing involves placing a small monitor in the lowest livable area of the home for 48–96 hours. The device measures radon concentration levels — results come back from the lab within a few days.

What Levels Are Concerning?

The EPA recommends mitigation for radon levels at or above 4 pCi/L. Levels between 2–4 pCi/L warrant consideration. A mitigation system (typically a sub-slab depressurization system) can reduce radon levels dramatically at relatively low cost.

Home Inspections LI offers certified radon testing as a standalone service or add-on to any home inspection. Serving Nassau and Suffolk County. Book online or call today.