Trader Joe's has been dethroned as America's favorite grocery store; this year, Wegmans took the crown, according to one annual survey. Customer insights firm Market Force Information on Wednesday published a new set of grocery rankings culled from survey responses of more than 10,000 people. They're based on a composite loyalty index that measures criteria including satisfaction with the food quality, checkout speed, value and customer service. For the first time in four years, Trader Joe's is not at the top of Market Force's list. It fell to the third spot behind Wegmans and Publix, respectively.

In an industry rife with competition, grocery chains must adapt to growing consumer needs and market trends. Particularly this year, as one in five consumers reported that they would not recommend their grocer to a friend or colleague, according to Market Force. Trader Joe's declined to comment.





"When you look at the top brands, I do want to be clear that the top three — Wegmans, Publix, Trader Joe's — they are very, very competitive," Cheryl Flink, chief strategy officer of Market Force, told CNBC. "There is hardly any difference in between the three of them." While Wegmans took the top spot with a loyalty rating of 76 percent, Publix and Trader Joe's are not far behind. Publix scored a 75 percent rating and Trader Joe's was ranked at 73 percent. The next closest grocery chain is Hy-Vee Food Stores which garnered a loyalty score of 68 percent. "Trader Joe's has not gone backwards on service," Flink said, explaining that competitors have improved in this regard. Wegmans, in particular, stands apart from other grocers because of its specialty items and brands and their quick cash-out experience, Flink said. Representatives for Wegmans were not immediately available for comment.