Water management

Local water conditions

The main part of Gränges’ water use is for cooling purposes, where much of the production equipment requires cooling water for efficient operations and to prevent overheating and production disruptions. The plants in Americas and Asia have closedloop cooling systems with a high degree of water recirculation, which reduce water consumption and the risk of water contamination. In addition, water is used to make up emulsions in different process steps and for domestic purposes.

In the production site in Huntingdon ground water from the company’s own wells is used, whereas municipal water is used in the Salisbury and Newport production sites. Cooling takes place in closed-loop systems using non-contact cooling towers. As the systems are closedloop, and therefore contain no contaminants, the used water can be discharged to nearby water bodies or to local waste water treatment plants without further treatment. Contaminated water is sent for external treatment.

In Gränges’ operations in Asia, municipal tap water is used. Water from the cooling system is re-used in other parts of the production process, for example in the cold rolling mill. Water of insufficient quality is discharged to the local waste water treatment plant, in accordance with the local drainage permit which limits water volumes and types.

In Gränges’ operations in Europe, surface water is withdrawn from two nearby lakes. The water is primarily used to cool components and is then released into local waterways. Daily measurements are made to ensure that the released water does not contain hazardous substances. Water that may contain contaminants is treated by an external partner before being returned to water bodies.


Water withdrawal by source, 2019

Water intensity

Managing water risks

Gränges’ operations are located in areas with various water risks, and water-related aspects are therefore managed based on local circumstances.

In terms of water stress, the production facilities in Finspång and Newport are located in areas with low-to-medium risk, whereas the Huntingdon and Salisbury facilities are in medium-to-high risk areas. The plant in Shanghai is situated in a highrisk area.* No water sources are considered to be significantly affected by the water withdrawal or discharge from Gränges’ operations.

* Based on the Aqueduct Water Risk Atlas developed by the World Resources Institute.

Targets and target fulfilment

See detailed information about Gränges’ long-term sustainability targets and target fulfilment.

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