The 67 types of bacteria growing in your coffee maker's drip tray.

Bacteria in coffee maker drip tray.A rich soup of coffee and bacteria in the drip tray of my Nespresso Inissia.

Note: As an Amazon Associate I earn from qualifying purchases.

Who would have thought it?

According to a study recently published in Nature magazine, the drip trays of dozens of Nespresso Inissia espresso machines were studied and found to contain between 35 and 67 different genera of bacteria.


Advertisement:

That’s a lot of different types of bacteria, particularly when you consider that caffeine has natural antibacterial qualities. 

The different types of bacteria found included Enterococcus, Pseudomonas, Stenotrophomonas, Sphingobacterium, Acinetobacter, Coprococcus, Paenibacillus and Agrobacterium.

While study was conducted using Nespresso machines, one can assume the same is true for the coffee that accumulates in the drip trays of any brewing system, whether it’s a single serve coffee maker or espresso machine.

If your machine has a drip tray, you have bacteria.

From what I understand, all the bacteria in the study arrived from the environment, not from the capsules of coffee that were used in the brewers. In your case, that would means from other surfaces in your kitchen.

Interestingly, for the first few days, a lot of a different bacteria found their way to the drip tray. But after a week or two, the bacteria that dominated were those best suited to a caffeinated environment.

And yes, some of the bacterial do have pathogenic qualities. That is to say, they can be bad for you.

So if you are in the habit of just rinsing the drip tray in the sink, you’re almost certainly distributing those bacteria to the surface of the sink, and to any other items that are within “splashing distance”.

The study was conducted for a few reasons, including an interest in finding out whether bacteria could be used as part of a coffee decaffeination process.

But the takeaway for coffee lovers is that you should clean your drip tray frequently, and that you should use soap and hot water. 

Just rinsing it will probably do more harm than good. 

As for bacteria and even mold lurking in other parts of your coffee maker, you'll find more information on that here.



More on coffee and your health.

Drinking coffee is good for you in so many different ways, and actually protects you against some serious diseases and illnesses. Find out more here...



Advertisement:






What's new...

  1. Waste-free gourmet coffee with Steeped Coffee.

    Nothing could be simpler and more waste-free than using a coffee bag to make coffee. Tastes good too.

    Read More

  2. Bag of home roasted beans is inflating

    A couple days after receiving a bag of home-roasted coffee beans, the bag is inflating. It was in a sealed bag that looked free of air. Now, it is

    Read More

  3. Vintage Percolator?

    I'm interested in finding a stainless steel percolator. I'd prefer stove top, but electric suggestions would be welcome too. My problem is that I want

    Read More

  4. Our review of the Bripe Coffee Brew Pipe.

    I’ve always wanted a coffee-making kit that’s small enough to take with me when I’m enjoying the outdoors. And now I have it…

    Read More





The 10 Best Coffee Blogs

The Best Coffee Blogs of 2016 by Market Inspector