The populations living in areas of California and other western states with boron-rich geological deposits have potentially high exposure to boron from drinking water and locally grown foods (Butterwick et al. 1989). Individuals using boron-containing cosmetics or medicines extensively, especially on damaged skin, may be exposed to higher-than-normal levels of boron (Beyer et al. 1983). Infants may be at risk in homes where boric acid containing roach powder on floor parameters is used to control cockroaches.
Workers in industries producing or using boron-containing materials also have potentially high exposure as noted above (Section 5.5). People living in the vicinity of waste sites are also at risk of higher-than-normal exposure levels.
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