Total water withdrawal by source

Water is used as cooling water, cleaning water, in products, and for general purposes like sanitary facilities. Sika uses around 2.04 million m3 (previous year: 2.36 million m3) both from public supply (68%) and groundwater wells (32%). In water-rich areas, like Switzerland, the UK, and Eastern USA, cooling water is mainly obtained from ground water wells in line with local permits. Cooling and process water makes up 42% of Sika’s water use. The company strives to increase water efficiency and has set the target to reduce water consumption by 3% per ton of product sold and year. This target has been achieved over the past 3 years with a total reduction of water consumption of 52.5%.

 

Water sources:  

  • Surface water: 29,000 m3 (previous year: 21,000 m3)
  • Ground water: 629,000 m3 (previous year: 968,000 m3)
  • Public supply: 1,387,000 m3 (previous year: 1,373,000 m3)
  • Rain water: A few factories have started to use rain water as part of their freshwater demand, specifically when public water supply is limited. There are no detailed data available.
  • Waste water: In many companies, water from rinsing and cleaning is reused. Some factories run own waste water cleaning facilities, e.g. through sedimentation, distillation, or filtration, and reuse filtrate or distillate for production or cleaning.

 

Sika uses water for the following purposes:

  • Process and cooling water: 865,000 m3 (previous year: 1,237,000 m3)
  • Sanitary water: 459,000 m3 (previous year: 420,000 m3)
  • Water in products: 721,000 m3 (previous year: 710,000 m3)

 

In some Sika sites ground water cooling capacity is used for secondary cooling cycles without removing water from the ground. This requires state permits, and the corresponding fees are accounted for as purchased cooling energy.  This specifically applies for Sika Manufacturing AG Sarnen, Switzerland, where 168’000 m3 of primary cooling water has been reduced due to the  use of a heat exchanger  within the ground feeding a secondary cooling water cycle. This accounts for 0.5 TJ of cooling energy if converted to electrical power for a chiller.