Concentrations of Lead in Groundwater and Human Blood in the Population of Palosai, a Rural Area in Pakistan: Human Exposure and Risk Assessment

Table 3

Lead concentrations (mg/L) in the groundwater samples.

Samples	Mean	Range	SD±	^aPak-EPA	^bWHO
Tube wells	0.039	0.022-0.067	0.00	0.05	0.05
Wells	0.004	0.004-0.015	0.01

^aPakistan Environmental Protection Agency (2008), ^bWorld Health Organization (2008); SD: std. deviation.