Environmental
What is the EPA's action level for radon in residential properties?
A2 pCi/L
B4 pCi/L✓ Correct
C6 pCi/L
D10 pCi/L
Explanation
The EPA recommends taking action to reduce radon levels if the concentration is 4 picocuries per liter (pCi/L) or higher. Mitigation systems can reduce radon levels in most homes.
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