Here’s why coffee tastes weird on an airplane

The beans aren’t really to blame.

In fact, a number of airlines now get their grounds from popular brand name roasters like Starbucks (Delta) or Dunkin’ Donuts (Jet Blue).

The real culprit: the H20 used in airplane brew.

Planes have tanks filled with ‘potable water’, aka water used for washing your hands in the bathroom and brewing coffee and tea, and it’s not the cleanest — a 2012 EPA report found that 12 percent of commercial airplane water tested positive for coliform bacteria, which usually indicates other gut-rocking bugs like E.coli are present.

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