BACKGROUND: Sarcoidosis is a granulomatous disease with varying courses of disease progression. Environmental exposures are thought to be contributors to disease onset. Exposure to air pollutants such as fine particulate matter of 2.5 μm diameter or smaller (PM RESEARCH QUESTION: Is higher exposure to PM STUDY DESIGN AND METHODS: We conducted a retrospective, cross-sectional study of individuals with pulmonary sarcoidosis seen from 2005 to 2015. Home addresses at the year of enrollment were geocoded, and exposure to PM RESULTS: Among the 415 individuals in the analysis, Black individuals had significantly higher exposure to PM INTERPRETATION: Higher exposure to PM