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Hexabromocyclododecanes (α-, β-, and γ-HBCDs) and tetrabromobisphenol-A (TBBP-A) were determined in indoor air from homes (n = 33; median concentrations ΣHBCDs = 180 pg m⁻³; TBBP-A = 15 pg m⁻³), offices (n = 25; 170; 11), public microenvironments (n = 4; 900; 27) and outdoor air (n = 5; 37; 1). HBCDs and TBBP-A were also determined in dust from homes (n = 45; median concentrations ΣHBCDs = 1300 ng g⁻¹; TBBP-A = 62 ng g⁻¹), offices (n = 28; 760; 36), cars (n = 20; 13,000; 2), and public microenvironments (n = 4; 2700; 230). While ΣHBCDs in car dust significantly exceeded (p < 0.05) those in homes and offices, TBBP-A in car dust was significantly lower (p < 0.05) than that in homes and offices. No significant differences were observed between ΣHBCDs and TBBP-A in air or dust from homes and offices. Compared to dietary and inhalation exposures, dust ingestion constitutes an important …