Table 7.

Comparison of dust lead from floors and windowsills from sampled childcare centers around the world.

Reference	Geographic Location	Floor Pb	Windowsill Pb	Units
This Study	Pacific Northwest, USA	0.62 (0.32); <0.27–1.4a	1.8 (1.8); <0.27–6.8a	ng/cm2
Marshall et al. [23]	Clark County, Nevada	16.5 (71.9); <21.5–1292a	45.73 (103.7); <43–797a	ng/cm2
HUD Report 2003 [5]	USA	1.4 (2.2); 0.65; 29.6b	22 (91); 2.6; 1,243b	ng/cm2
Durkee et al. [21]	Yakima Valley, Washington	0.43–6.8c	NSd	ng/cm2
Weismann et al. [20]	Iowa City, Iowa	<2.7–54c	15–18,000c	ng/cm2
Canha et al. [30]	Clermont-Ferrand and its surrounding area in the Auvergne region, France	16 (19); 9e	NSd	ng/cm2
John et al. [25]	Soshanguve and Pretoria East, South Africa	17.3 f,g; 6.4 f,h	55.8 f,g; 10.0 f,h	ng/cm2
Orlova et al. [24]	Moscow, Russia	<1700i	NSd	ng/cm2
Washington State DOH [29]	Six Counties, Washington	0–1000c	NSd	µg/g
Fernandez et al. [26]	Caracas Valley, Venezuela	732–1707c	NSd	µg/g
Berglund et al. [27]	Sweden	44–240c	NSd	µg/g

^aMean (standard deviation); range.

^bMean (standard deviation); median; maximum.

^cRange.

^dNS = not sampled.

^eMean (standard deviation); median.

^fMean.

^gSoshanguve.

^hPretoria East.

ⁱDetection limit.