▁today ▁is ▁fer ment ed ▁in ▁st ain less ▁steel ▁v ats . ▁There ▁are ▁three ▁DO ▁cert ified ▁vari eties . ▁ ▁Most ▁tx ak oli ▁is ▁grown ▁in ▁the ▁Atlantic ▁regions ▁of ▁the ▁Bas que ▁Country , ▁areas ▁with ▁high ▁ra inf all ▁( between ▁ 1 0 0 0   mm ▁and ▁ 1 6 0 0   mm ▁of ▁annual ▁ra inf all ▁on ▁average ) ▁and ▁average ▁temper atures ▁between ▁ 7 . 5   ° C ▁and ▁ 1 8 . 7   ° C , ▁occasionally ▁suffering ▁from ▁fro st . ▁ ▁T x ak oli ▁from ▁Get aria ▁ ▁Get aria ko ▁T x ak ol ina ▁in ▁Bas que , ▁Ch ac ol í ▁de ▁Gu et aria ▁in ▁Spanish . ▁This ▁variety ▁comes ▁from ▁a ▁small ▁region ▁in ▁G ip uz ko a ▁around ▁the ▁towns ▁of ▁Get aria , ▁Zar aut z ▁and ▁A ia ▁and ▁is ▁of ▁a ▁very ▁pale ▁yellow ▁to ▁green ▁color . ▁This ▁was ▁the ▁first ▁variety ▁of ▁tx ak oli ▁to ▁receive ▁the ▁DO ▁cert ification ▁in ▁ 1 9 8 9 . ▁ ▁The ▁cultiv ated ▁area ▁has ▁increased ▁from ▁ 6 0 ▁ha ▁to ▁ 1 7 7 ▁ha ▁since ▁cert ification . ▁Ann ually ▁some ▁ 9 0 0 , 0 0 0 ▁lit res ▁are ▁produced ▁in ▁this ▁area , ▁mostly ▁on ▁south - east ▁facing ▁s lop es ▁to ▁protect ▁the ▁v ines ▁from ▁the ▁har sh ▁Atlantic ▁weather . ▁Un like