Nassau and Suffolk Counties of Long Island, New York are densely populated and contain 34 federally-designated and 449 state-designated Superfund sites, potentially exposing communities to toxic releases. We conducted a distributive justice analysis assessing proximity to Superfund sites, community socio-demographics, and other environmental burdens. Socio-demographic and environmental variables for 665 census tracts were obtained from the United States Census and Environmental Protection Agency's Environmental Justice Screening and Mapping Tool. Hierarchical Bayesian spatial Poisson regression models evaluated the relationship between socio-demographic and environmental variables and counts of Superfund sites per census tract. Analyses were further stratified by county and site type (Federal versus State). A 10% increase in low-income residents was associated with a 47% increase in Superfund sites (Risk Ratio [RR]: 1.47
95% credible interval (CI): 1.20-1.81). A 10% increase in Hispanic/Latino residents was associated with a 20% increase (RR: 1.20
95%CI: 1.02-1.42). Higher PM