16 Sep '18, 11am
Notably, the agency said only 15 percent of the 10,187 samples tested were free from any detectable pesticide residues. That's a marked difference from 2014, when the USDA found that more than 41 percent of samples were "clean" or showed no detectable pesticide residues. Prior years also showed roughly 40-50 percent of samples as free of detectable residues, according to USDA data. The USDA said it is not "statistically valid" to compare one year to others, however, because the mix of food sampled changes each year. Still the data shows that 2015 was similar to the years prior in that fresh and processed fruits and vegetables made up the bulk of the foods tested.