Frequently asked questions

Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. It moves through the ground and can accumulate inside buildings, particularly in lower levels.

According to the EPA and Surgeon General, long-term exposure to elevated indoor radon increases the risk of lung cancer over time. Radon is the leading cause of lung cancer among people who have never smoked.

A calibrated device is placed in a suitable lower-level indoor location for a defined period. The device measures radon in the air during that period, and the reading is reported in picocuries per liter (pCi/L).

Yes. A radon test during the inspection period gives you documented information about indoor air conditions before you take ownership. It is one of the most straightforward tests to add to an inspection.

Pre-listing testing gives sellers documented information about their home before buyers request it. If the result is low, that can be a positive disclosure. If it is elevated, sellers have time to plan ahead of the transaction.

It is not required by state law in every transaction, but it is a routine part of many Rhode Island inspection periods and is frequently requested by buyers.

It is an independent radon test performed after a mitigation system has been installed and run for its startup period. It confirms the system is bringing indoor radon down to acceptable levels.

A continuous radon monitor is an electronic device that records radon levels hour by hour, produces an average, and typically includes tamper detection and environmental sensors.

The EPA recommends that all homes be tested for radon and that action be taken when the long-term average reaches or exceeds 4 pCi/L. The EPA also suggests homeowners consider action between 2 and 4 pCi/L.

Yes. The Rhode Island Department of Health administers a state radon program that provides public information, tracks testing and mitigation professionals, and aligns state guidance with EPA recommendations.

Costs vary based on the test type (short-term, long-term, continuous monitor), the property, and any real-estate documentation needs. Call (401) 360-5888 for current pricing tailored to your situation.

In the United States, indoor radon is reported in picocuries per liter of air (pCi/L). Elsewhere it is often reported in becquerels per cubic meter (Bq/m³). 1 pCi/L is approximately 37 Bq/m³.

Testing rental units — particularly ground-floor and basement-adjacent units — is a reasonable step for landlords who want to understand and document indoor air conditions.

Yes, new homes can have radon. Radon enters from the ground, and any home built on soil or bedrock that can generate radon can measure elevated levels regardless of when it was built.

Radon can accumulate in commercial buildings, particularly on lower floors. Schools, daycare centers, offices with basement space, and similar buildings are reasonable candidates for testing.