CHOMETZ may be purchased immediately after Pesach at the following stores in the Detroit area, except for Dunkin Donuts (10 & Greenfield) where chometz should not be bought until 10:30 PM, due to the Halachic requirement of “bichdei sh’yaasu”.

All K-COR certified establishments
Aldi
Busch’s Fresh Food Market
Costco
CVS
Dollar Tree Stores
Family Dollar Stores
GFS (Gordon Food Service)
Joe Randazzo’s Fruit Market
K-Mart
Meijer
Nutrifoods
One Stop Kosher Market
Plum Market
Rite Aid
Save-A-Lot (11 & Greenfield)
Sam’s Club Warehouse
Superior Kosher Meats
Trader Joe’s
Wal-Mart
Walgreens
Westborn
Whole Foods

It is advisable to wait two weeks after Pesach (May 12) before buying “pure” chometz products (e.g., bread, grain cereals, pasta, cookies and pretzels) at Jewish-owned stores that do not observe Pesach, even if they made a Mechiras Chometz before Pesach, due to the possibility that new chometz was received during Pesach. This includes Restaurant Depot, Johnny Pomodoro’s Fresh Market, and Natural Food Patch. It is permitted to purchase most other products immediately after Pesach, including pearled raw barley, dry cake mixes, flour (without malted barley), glue, all kitniyos, ketchup, mayonnaise, medicines, mustard, vinegar, vitamin tablets, baker’s yeast, and yeast extract.
Buying chometz from Kroger and Target in the Detroit area after Pesach involves Halachic uncertainty. Although these stores are owned by non-Jews, there is a possibility that they are supplied by privately-owned Jewish food distributor C&S, and the chometz sold after Pesach may have been in the possession of C&S during Pesach. Since it is difficult to gather precise information, it is commendable to wait two weeks after Pesach (May 12), before buying “pure” chometz items from these stores.