Romaine is raw, field-grown, and everywhere: no cooking step kills bacteria, outdoor fields expose it to contaminated water and wildlife, and huge consumption means contamination events get found.
The FDA's investigation of a 2018 outbreak traced contamination to irrigation water from an on-farm reservoir, and leafy greens have been a repeated E. coli vehicle. Consumer rules: washing does not reliably clear E. coli from greens, so recalled lettuce goes in the bin, not the colander; follow outbreak notices; refrigerate promptly; and higher-risk groups, pregnant, immunocompromised, very young, or older, should heed recalls strictly.
What to do
Common questions
Why does romaine lettuce keep getting recalled?
Romaine keeps making recall news because of how it is grown, eaten, and sold. It is a leafy green eaten raw, so there is no cooking step to kill bacteria; it grows low to the ground in open fields, exposed to contaminated irrigation water, wildlife, and nearby livestock operations; and it is one of America's most-consumed lettuces, so any contamination touches millions of salads. The FDA's investigation of a 2018 multistate E. coli O157:H7 outbreak traced problems to the water itself: romaine was irrigated with water from an on-farm reservoir that was found to be contaminated. Leafy greens have been a repeated suspect or confirmed vehicle in multiple E. coli outbreaks over the years, per the FDA, which is why you see the pattern in headlines. What you can do: washing helps a little but does not reliably remove E. coli from leafy greens, which is why recalls say throw the lettuce out, not wash it; pay attention to outbreak notices and bin affected products; buy whole heads over bagged chopped mixes when you can, since cutting creates more surface for bacteria; and refrigerate greens promptly. The risk in perspective: millions eat romaine safely daily, but immunocompromised people, pregnant women, young children, and older adults should take outbreak notices seriously.