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Normal atmospheric barium levels?

April 26, 2017atmospheric Barium levels normal

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Normal atmospheric barium levels?

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Via the EPA: The primary source of barium in the atmosphere is industrial emissions. Barium concentrations ranging from 0.0002 ug/m3 to 0.028 ug/m3 (mean of 0.012 ug/m3) have been detected in urban areas of North America (ATSDR, 1992). Barium is naturally occurring in most surface waters and in public drinking water supplies. Barium content in U.S. drinking water supplies ranges from 1 to 20 ug/L; in some areas barium concentrations as high as 10,000 ug/L have been detected (WHO, 1990). Barium is ubiquitous in soils, with concentration ranging from 15 to 3000 ppm.