Contact with indoor dust is a key chemical exposure route for small children. Hundreds of pollutants are found on indoor dust particles, reflecting the surrounding environment and human activities. This project will focus on the analysis of a wide range of chemical contaminants in indoor dust collected from homes of families with young children, to characterize the exposures and potential impacts of dust exposure on children, particularly related to the development of allergies. The project will involve laboratory analysis of dust and quantification of chemicals including plasticizers, flame retardants, and pesticides. Data will be used to estimate children’s exposure to chemicals via dust, and link this with geographic data about the location of the home and type of building. This master's project is in support of a larger project combining analysis of chemicals with microbiome profiling of house dust to understand the interaction between chemicals and microbes in dust, with implications for children’s exposure.