Figure 4

Gridded and imaged 1996 blood lead levels of child residents in the suburbs surrounding the Cockle Creek lead-zinc smelter, North Lake Macquarie, NSW, Australia. Navy: BLL < 5.5 μg/dL, Turquoise: 5.5 μg/dL – < 7.5 μg/dL, Green: 7.5 μg/dL – < 10 μg/dL, Yellow: 10 μg/dL (the NHMRC national level of concern)- < 15 μg/dL, Red: ≥ 15 μg/dL.