Water usage is divided into two main categories: industrial process water and non-contact cooling water. All cooling water cycles are closed-loop systems, whereby the exchanged heat is dissipated by air and evaporation (cooling tower) or by river water as in Visp (CH).
Industrial water consumption, closely related to production volume, capacity use and product mix, amounted to 7.8 million cubic meters in 2019. The decrease in the water consumption per mio CHF reflects the water-saving initiatives and changes in the product portfolio (Note: 2017 data exclude the Capsugel business).
All cooling water networks are separated from any industrial water networks to prevent accidental pollution of water. Total cooling water used by Lonza in 2019 amounts to 141 million cubic meters, with Visp accounting for 99%.