Do US Ambient Air Lead Levels Have a Significant Impact on Childhood Blood Lead Levels: Results of a National Study

Table 2

Descriptive statistics of 1508 counties with 50 or more children tested for blood lead.

	Percent; below; poverty	Percent; rural	Percent; Black	Percent; pre-50	Population	NATA; 2005
Mean	13.6	56.8	10.6	25.7	97366	0.0013
Min	2.6	0	0.26	0.78	1844	0.0005
Max	41.13	100	86.5	66.7	5376741	0.0149