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. 2021 Jul 21;21:1437. doi: 10.1186/s12889-021-11494-1

Table 4.

Lead concentrations compared with international standards

Lead level Median (IQR) Standard limit p-value
Scratched paint (ppm) 105.6 (71.1–123.7) 90 (CPSCa) 0.28
House floor dust (μg/ft2) 77.4 (66.5–84) 10 (EPAb) < 0.001
Interior window-sills dust (μg/ft2) 291 (231.2–345.2) 100 (EPAb) < 0.001
Tap water (μg/kg) 63.5 (36–78.9) 15 (EPAb) < 0.001
Spice (μg/kg) 56.7 (20.6–98.5) 300 (WHOc) < 0.001

a Consumer product safety commission

b Environmental protection agency

c World health organization