RT Journal Article SR Electronic T1 Hazardous levels of PM2.5 (particulate matter less than 2.5 microns in mean aerodynamic diameter) are emitted during burning of individual fire crackers in India JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP PA3953 DO 10.1183/13993003.congress-2016.PA3953 VO 48 IS suppl 60 A1 Sneha Limaye A1 Rohan Shah A1 Dhammasagar Ujagare A1 Jyoti Londhe A1 Sapna Madas A1 Sundeep Salvi YR 2016 UL http://erj.ersjournals.com/content/48/suppl_60/PA3953.abstract AB Diwali or the festival of lights is the most popular festival celebrated in India, when fire crackers are burnt in almost every household for 3 days. Levels of ambient air pollution are reported to be very high during the Diwali festival. In this study we aimed to measure personal exposure levels to PM2.5 during the burning of six of the most commonly used fire cracker types in India.Methods: Sparklers, ground spinners, flower pots, pulpuls, garland of 1000 sounding crackers and snake tablets were burnt outdoors in an open area during the late evening hours. PM2.5 levels were measured at a distance and height from where they are normally burnt using Thermo PDR 1200, USA.Results: Duration of exposure and peak PM2.5 levels for each of the fire crackers are given. Conclusion: Diwali fire crackers produce extremely high levels of PM2.5 over a short period of time with the snake tablet producing a peak level of 64,850 mcg/m3. Burning of fire crackers during Diwali festival is a major public health problem in India.