Table 8 Comparison of soil lead concentrations from sampled childcare centers around the world and U.S. soil lead background concentrations.
Reference | Geographic Location | Soil Pb Concentration (mg/kg) |
---|---|---|
This Study | Pacific Northwest, USA | 22 (12); 8.4–50a |
Marshall et al. [23] | Clark County, Nevada | 35.89 (40.77); <7–160a |
HUD Report 2003 [5] | USA | 81 (329); 28; 3582b |
Button [22] | greater Cincinnati area (5 county region surrounding the University of Cincinnati campus), Ohio | 11–990c,d; 17–4636c,e |
Weismann et al. [20] | Iowa City, Iowa | <10–1100c |
Washington State DOH [29] | Six Counties, Washington | 0–1400c |
Aclan et al. [28] | Manila, Philippines | 1.12–2.59c |
Fernandez et al. [26] | Caracas Valley, Venezuela | 142–465c |
Orlova et al. [24] | Moscow, Russia | 500–2000c |
Haugland et al. [14] | Bergen, Norway | 91; 39; <5–1779f |
John et al. [25] | Soshanguve, Pretoria East, South Africa | 17.7g; 6.9h |
Berglund et al. [27] | Sweden | 410; 480; 610i |
https://www.epa.gov/superfund/usgs-background-soil-lead-survey-state-data | Washington | 26.6; 6.1–513.0j |
Oregon | 14.4; 2.7–44.7j | |
Idaho | 21.2; 5.5–158j |