The COOC web site lists California olive oils that they've certified. Last time I checked California Gold Olive Oil was certified, and they even sell it in half and full gallons. That's just one I've tried and liked-- there are a bunch of others listed on the COOC web site. (Edit: there are probably certification trade associations for other countries/regions, COOC is just the one I'm familiar with.)
"Silver lining:" there's a good chance that oil was either rancid or doesn't pass basic quality tests for the "extra-virgin" part:
https://www.ucdavis.edu/news/imported-olive-oil-quality-unre...
The COOC web site lists California olive oils that they've certified. Last time I checked California Gold Olive Oil was certified, and they even sell it in half and full gallons. That's just one I've tried and liked-- there are a bunch of others listed on the COOC web site. (Edit: there are probably certification trade associations for other countries/regions, COOC is just the one I'm familiar with.)