706jim said: Although one has to wonder about bacteria given the practise of dumping holding tanks into the ocean with so many boats in a small area.
Given the topic of " watermakers", one would have to wonder about your conflation of boat tap water tanks with sewage tanks. You might want to reconsider your thoughts.
I had to look up conflation. Sewage contaminated water is sucked up by the watermaker and desalinated. Do these gadgets sanitize the water as well? I don't know.