In the quiet accumulation of household dust, EPA Victoria found a largely reassuring portrait of modern chemical life: nearly all of the 184 substances detected across 132 samples from Victorian homes fell within levels science considers safe. Yet the past has a way of persisting — lead from historical paint, a hazard long thought receding, still surfaces above safe thresholds in older homes. The study, born from genuine community curiosity and citizen science, reminds us that the invisible world we inhabit is shaped as much by history as by the present.