This chapter provides a comprehensive discussion on the nature of radon
problem using relevant literature. This chapter emphasizes details on the aspects of
radon formation, units of measurement for radon, pathways for radon entry into homes
and the influencing factors, radon monitoring techniques, radon action levels, health
effects of radon exposure, and control measures to reduce in-house radon exposure.
Keywords: Radon, 222Rn, radon formation, uranium decay, sources of radon, radon
in geological materials, radon in building materials, radon in water, radon in natural
gas, radon in outdoor air, radon measurement, emanation coefficients, radon transfer
coefficients, radon action limits, USEPA action limit for radon, WHO action limit
for radon, radon health effects, radon cancerous risk, radon control measures for new
constructions, radon control measures for existing constructions.
