Independent laboratories regularly test the water we supply to ensure that it meets all the legal requirements.
Customers can inspect the results of water testing for their area, free of charge.
The Drinking Water Inspectorate monitor the performance of water companies. Complaints about water quality are investigated free of charge. These sources are treated at 23 treatment works. The treated water is distributed by pumping and gravity through 34 service reservoirs and towers and some 2,158 km of water mains. The supply area is divided into 14 water supply zones.