| accumulation and perchlorate exposure potential of lettuce produced in the lower colorado river region. | the colorado river is contaminated with perchlorate concentrations of 1.5-8 microg/l, an anion linked to thyroid dysfunction. over 90% of the lettuce (lactuca sativa l.) consumed during the winter months in the united states is produced in the lower colorado river region. studies were conducted in this region to survey the potential for lettuce perchlorate accumulation and estimate potential human exposure to perchlorate from lettuce. total uptake of perchlorate in the above-ground plant of iceb ... | 2005 | 15969537 |