Incoming Natural Corks - Average TCA Score

CQC Audit Results - December 2020

CQC screening results from incoming cork shipments, for the three month period ending 12/31/20, displayed the lowest incidence of TCA observed for this time period to date. Correspondingly, the percentage of cork shipments rejected by CQC Members was reduced.

Analysis of natural cork shipments continues to demonstrate a steady reduction in the occurrence of the chemical compound associated with taint. Since the adoption of its chemical testing method, the California based Cork Quality Council has screened every shipment of natural corks its members have brought to their warehouses. Before CQC members accept any cork lot into inventory, screening samples are sent to ETS Laboratories for GC/MS analysis of 2,4,6-Trichloroanisole (TCA).

Historic results show major reductions in TCA

Last year, CQC members conducted over 30,000 analyses. Their combined screening records show a steady reduction in measurable TCA levels that are now 98% lower than the results seen when records were first tabulated in 2001.