MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY
Drinking water samples being tested. Chemist handling samples of drinking water from a waterworks. The water used to produce drinking water is tested at every stage for excessive amounts of pollutants, heavy metals, toxins and micro-organisms. The water, obtained from a river, goes through stages such as solids purification and ozone disinfection. Photographed at a laboratory operated by SMAT, the metropolitan water company of Turin, Italy.
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