KEY POINTS
  • Arizona lettuce growers say they knew immediately that November's E. coli outbreak linked to romaine lettuce likely originated on California farms.
  • Just days after the initial warning, officials and industry representatives reached a voluntary agreement to label where the romaine was grown.
  • "In hindsight, some of the stuff that they're requiring right now maybe should have been done back then," said one Arizona grower.

Lettuce growers say they knew immediately that November's E. coli outbreak linked to romaine lettuce likely originated on California farms, but U.S. health officials issued a blanket warning that no romaine was safe to consume. That warning halted sales of all romaine, prompting the industry to implement temporary labeling requirements that some farmers hope will be permanent.

Through a voluntary market withdrawal, health officials ensured a "clean break" to "purge the market of potentially contaminated" lettuce, according to a Food and Drug Administration press release.