One of the main auxiliary materials for the chemical industry is water. Foremost, it is used as a coolant and as process water in the production. Of Clariant’s total of 48 million m³ of water quantity purchased in 2016, about 70 % has been used for the cooling of its production plants, 20 % for production processes and 10 % as product component or for sanitary purposes. The water requirements, especially at the large production sites, are primarily supplied by river water. Before it flows into the piping system at each site, the river water is cleaned using various filter systems according to its intended purpose. Remaining amounts are obtained from the respective local water grids, but not in volumes that would significantly impair the water system.