A home should be mitigated if the radon level is at least how many picocuries per liter?

A home should be mitigated if the radon level is at least how many picocuries per liter?

• A. 4
• B. 6
• C. 2
• D. 1

Answer: (A)

Radon exposure increases lung cancer risk, so housing professionals use a clear action level to decide when to mitigate. The Environmental Protection Agency sets four picocuries per liter as the point at which mitigation is recommended. If a home's radon test shows at least this level, reducing indoor radon becomes important to lower long-term exposure. Mitigation aims to bring the concentration below four pCi/L using methods such as active soil depressurization, sealing entry paths, and improving overall ventilation. Levels below this threshold are not automatically required to mitigate, but testing should be repeated periodically because radon levels can change with seasons, weather, or changes to the building.

Radon exposure increases lung cancer risk, so housing professionals use a clear action level to decide when to mitigate. The Environmental Protection Agency sets four picocuries per liter as the point at which mitigation is recommended. If a home's radon test shows at least this level, reducing indoor radon becomes important to lower long-term exposure. Mitigation aims to bring the concentration below four pCi/L using methods such as active soil depressurization, sealing entry paths, and improving overall ventilation. Levels below this threshold are not automatically required to mitigate, but testing should be repeated periodically because radon levels can change with seasons, weather, or changes to the building.