Seems like these results should be taken with a grain of salt, since this group appears to have an agenda they're pushing:

https://en.wikipedia.org/wiki/Environmental_Working_Group:

> The Environmental Working Group (EWG) is an American activist group that specializes in research and advocacy in the areas of agricultural subsidies, public lands, and corporate accountability....

> The accuracy of some claims made by EWG have been criticized by the scientific community and others.