Pompeian, Inc., is the first olive oil manufacturer to attain a U.S. Department of Agriculture’s quality assurance logo. In April, the agency expanded its Quality Monitoring Program to include extra-virgin and organic extra-virgin olive oil.

Last year, researchers from the University of California-Davis and Australian Oils Research Laboratory reported a majority of popular brands of extra-virgin olive oil sold in California stores don’t qualify as such. To be considered extra virgin (the top grade of olive oil), the oils must have no sensory defects such as rancidity. They also must offer some fruity flavor and aroma and meet very specific chemistry based criteria.

Read more at olivecenter.ucdavis.edu.