Yorkshire Water is a water supply and treatment utility company servicing West Yorkshire, South Yorkshire, the East Riding of Yorkshire, part of North Lincolnshire, most of North Yorkshire and part of Derbyshire, in England. The company has its origins in the Yorkshire Water Authority, one of ten regional water authorities created by the Water Act 1973, and privatised under the terms of the Water Act 1989, when Yorkshire Water plc, the parent company of the Yorkshire Water business, was floated on the London Stock Exchange. The parent company was Kelda Group in 1999. In February 2008, Kelda Group was bought by a consortium of infrastructure funds. It is regulated under the Water Industry Act 1991. Area The company's area includes West Yorkshire, South Yorkshire, the East Riding of Yorkshire, part of North Lincolnshire, most of North Yorkshire and part of Derbyshire. The area is adjoined on the north by that of Northumbrian Water, on the west by United Utilities, on the south west by Severn Trent Water and on the south by Anglian Water. It serves 5.5 million households and 140,000 business customers, and owns over of land. Environmental record Yorkshire Water has received fines for breaches of environmental law. For example: Yorkshire Water was fined twice in April 2007. The first offence was for allowing polluting matter to enter Clifton beck in Brighouse, contrary to section 85(1) of the Water Resources Act 1991. The final incident killed one third of the wildlife along over a mile of the stream. A further incident in the same beck led to a fine of £2,400 in 2004. Yorkshire Water argued that the blockage causing the offence was caused by a third party. Eleven days later, the company was in court again to admit to breaching its discharge consent at its Neiley sewage works, Honley. The discharge consent allowed for biological oxygen demand to exceed 21 mg/L more than three times a year. The Environment Agency demonstrated that the works had breached this limit five times in 2005, resulting in a fine of £16,000 plus £754 in costs. Yorkshire Water was fined £6,000 and ordered to pay £9,051 in costs for supplying "unfit water" in May 2006 in a prosecution brought by the Drinking Water Inspectorate, under the Water Industry Act 1991. It pleaded guilty to three offences. Properties in Harlow Moor, Harrogate, had received discoloured water supplies in February 2004, which was