Abstract: The slum dwellers suffer from a lot of problems in day to day life in terms of socio-cultural and economic environment. They can not avail proper education due to poor economic condition and uncertainty in livelihood and thus have to choose different indoor economic activities. As per 2011 census, the total population of Rajpur-Sonarpur Municipality is 424,368 with population density of 1574/Km2.The slum dwellers live overcrowding in lightless suffocating and unhygienic places and many of them suffer from poor indoor air quality (IAQ). As a result they have to face different health hazards like respiratory illness, lung disease, skin disease, eye dryness etc. In this paper, an enquiry has been conducted to highlight the present condition of indoor air pollution of the slum area of Rajpur-Sonarpur Municipality and also focus on the problems of monitoring indoor air pollution and its control. Keywords: health hazards, IAQ, suffocating and unhygienic places