This is from CDC website:
Based on new information, CDC is expanding its warning to consumers to cover all types of romaine lettuce from the Yuma, Arizona growing region. This warning now includes whole heads and hearts of romaine lettuce, in addition to chopped romaine and salads and salad mixes containing romaine.
Do not buy or eat romaine lettuce at a grocery store or restaurant unless you can confirm it is not from the Yuma, Arizona, growing region.
Looks like only romaine from Yuma, AZ is recalled. Costco lettuce comes from Salinas CA, but I think I’ll just toss them to be safe. YMMV.