Environmental

The EPA's action level for radon in residential buildings is:

A2 pCi/L
B4 pCi/L✓ Correct
C6 pCi/L
D10 pCi/L

Explanation

The EPA recommends mitigation when indoor radon levels reach 4 picocuries per liter (pCi/L) or higher, though levels above 2 pCi/L may warrant consideration.

Related Indiana Environmental Questions

Practice More Indiana Real Estate Questions

1,500+ questions covering all exam topics. Start free — no signup required.

Take the Free Indiana Quiz →