Propylene exposure above 1500 ppmv (as per Protective Action Criteria) from the residential sources such tobacco, wood combustion, cleaning agents and air fresheners are the largest contributors of acute health effects like dizziness, lightheadedness, headaches, nausea, eye irritation and respiratory discomfort. Severe exposure may also lead to central nervous system (CNS) toxicity, hyperosmolarity, hemolysis, cardiac arrhythmia, seizures, agitation, and lactic acidosis, especially in children. Indoor smoking is the largest contributor to rise the propylene levels up to 30 times and major source for individuals without occupational exposure.