I've found this article just recently, and many facts surprised me.
"•76 percent of samples bought at groceries had all the pollen removed, These were stores like TOP Food, Safeway, Giant Eagle, QFC, Kroger, Metro Market, Harris Teeter, A&P, Stop & Shop and King Soopers.
•100 percent of the honey sampled from drugstores like Walgreens, Rite-Aid and CVS Pharmacy had no pollen.
•77 percent of the honey sampled from big box stores like Costco, Sam’s Club, Walmart, Target and H-E-B had the pollen filtered out.
•100 percent of the honey packaged in the small individual service portions from Smucker, McDonald’s and KFC had the pollen removed. "