Health effects of exposure to natural arsenic in groundwater and coal in China: an overview of occurrence.(Mini-Monograph)(Report)

From: Environmental Health Perspectives | Date: April 1, 2007| Author: | Copyright information

Between 2001 and 2005, 21,155 of 445,638 wells in 20,517 villages in 292 counties in 16 provinces from China, or 5% of wells, were found to contain > 50 [micro]g/L arsenic (As) by field testing with the Merck As kit. We achieved quality assurance of analysis of at least 10% of the wells containing > 50 [micro]g/L As using hydride generation atomic fluorescence spectrometry and silver dithiodicarbomate spectrometry. Our best estimate of the population exposed to > 50 [micro]g/L As in drinking water was 582,769. This is probably an underestimate for China because of the limited area ... 

<50  2002 
Total                                             2001-2005 
 
Abbreviations: E, east; N, north; NE, northeast; NW, northwest; SW, 
southwest. 
(a) Provinces are listed in descending order of the percentage of wells 
with>

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