Waterwise Wednesday: Reading Coffee Rings

The coffee ring could be a new test for drinking water quality. Tap water leaves distinct patterns and whorls its dried residue, like a coffee ring. The markers indicate water hardness and alkalinity, as well as the presence of dissolved solids and metals.

Researchers at Michigan State University hope the ‘Coffee – Ring Effect’ will provide an inexpensive and accessible way for people to identify traits in their drinking water.

 

 

 

 

Photo: Yuto Ooi et al. CC- Modified from http://www.tandfonline.com/…/…/10.1080/14686996.2017.1314776

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