Safety of using industrial water for hand washing Industrial water taps are present in most biology laboratories I have been too. There are accompanied by a sign stating "do not drink". So obviously it is not a good idea to drink it. However I could not find any information or reference concerning its safety for body use. The only indication I could find is that eye wash stations are using potable water instead of industrial water, suggesting that industrial water is not suitable for eye contact - at least. My question: _is it safe to use industrial water available in labs for hand washing, multiple times per day over the course of several years?_ I am looking for a precise answer about the possible long term harm of industrial water in this context, if possible with references. !enter image description here

The water from taps labelled "Industrial Water, Do Not Drink" comes from the same potable water line as domestic taps. The line should be split somewhere in the building, with the industrial line containing multiple backflow inhibitors to prevent cross contamination of potable or domestic water. Based on that fact, the water should be safe for hand washing, however, should be tested in the case of objective concern.