Yorkshire Water
A regulated water supply, wastewater and drainage utility serving much of Yorkshire and adjoining areas in northern England.
Last updated October 31, 2026
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Overview
Yorkshire Water is a regional water and wastewater utility serving most of Yorkshire and smaller adjoining areas of northern England. Its operating territory covers West Yorkshire, South Yorkshire, the East Riding of Yorkshire, most of North Yorkshire, part of North Lincolnshire and part of Derbyshire. The company supplies treated drinking water, collects and treats sewage, manages drainage infrastructure, operates reservoirs and treatment works, and owns a substantial rural landholding associated with its water assets. The service area includes major urban centres such as Leeds, Bradford, Sheffield, Hull, York, Huddersfield, Halifax and Doncaster, as well as extensive rural and coastal communities. The organisation’s institutional origins lie in the Yorkshire Water Authority, one of ten regional water authorities established under the Water Act 1973. In the English and Welsh water-industry reorganisation that followed, the undertaking was transferred into a private-sector structure under the Water Act 1989. Yorkshire Water plc, the parent company of the operating business, was floated on the London Stock Exchange at privatisation. The group later became associated with Kelda Group, which was its parent by 1999. In February 2008, Kelda was acquired by a consortium of infrastructure funds, after which Yorkshire Water continued as a privately owned regulated utility rather than as a quoted operating group. The company operates within the statutory and regulatory framework of the Water Industry Act 1991 and is overseen principally by Ofwat, the Environment Agency and the Drinking Water Inspectorate. Like other privatised English water companies, it is a regional monopoly for its core network services, with performance judged through drinking-water quality, environmental compliance, leakage, resilience, customer service and investment outcomes. Its area is bordered by Northumbrian Water to the north, United Utilities to the west, Severn Trent Water to the south-west and Anglian Water to the south. Yorkshire Water’s public reputation has been shaped by both operational achievements and serious failures. The drought of 1995–96 exposed weaknesses in regional resilience: reservoirs in the western part of the region ran low or dry, requiring an emergency tanker operation to move water from the east. Ofwat subsequently restricted the company’s ability to increase bills, describing the measure as a response to inadequate service standards. The company later invested in interconnection infrastructure intended to improve the balancing of supplies between eastern and western parts of the region. Customer-service assessments subsequently improved, and the business received sector recognition in the 2010s, although leakage, environmental incidents and service interruptions have continued to attract criticism. Environmental and public-health controversies include the 1992 failure of a sewage-sludge tip at Deighton near Huddersfield, which sent almost 20,000 tonnes of material into the works and blocked the River Colne; pollution prosecutions in 2007; repeated historical prosecutions over water quality; and a 2008 investigation concerning sewage entering Whitby Harbour after a pump failure. The company also faced criticism after the 2007 Hull floods, when failure of the Bransholme pumping station was said to have worsened flooding, and after a 2022 Sheffield burst-main incident that disrupted the local gas network and left thousands of properties without gas during freezing weather. Yorkshire Water reported serving approximately 5.5 million household customers and 140,000 business customers in the reference material. It also owns more than 28,000 hectares of land. Its long-term role is increasingly linked to climate resilience, leakage reduction, wastewater capacity, flood-risk management, catchment protection and maintaining public trust while operating under price and environmental regulation.
History
Yorkshire Water emerged from the regionalisation of water administration created by the Water Act 1973. The Yorkshire Water Authority began operating in 1974, bringing together a wide range of earlier municipal and joint water undertakings across the region. These predecessors included services associated with Bradford, Leeds, Sheffield, Hull, Huddersfield, York, Scarborough, Doncaster, Rotherham, Barnsley, Halifax, Harrogate, Ripon, Keighley and other local authorities and water boards. The authority therefore inherited a complex network of reservoirs, treatment works, mains and sewerage assets developed over many decades. The Water Act 1989 transformed the English and Welsh water industry. Yorkshire Water’s business was placed in a private company structure, and Yorkshire Water plc was floated on the London Stock Exchange as part of the privatisation. The operating company became associated with Kelda Group, which was its parent by 1999. In early 1999 Yorkshire Water also acquired York Waterworks Company, a smaller water-only undertaking serving York and tracing its origins to the York New Waterworks Company, founded in the nineteenth century. In February 2008, Kelda Group was bought by a consortium of infrastructure funds. The company’s most damaging early modern crisis was the 1995–96 drought. Western reservoirs ran critically low, and water was transported from the east of the region by hundreds of tankers, with thousands of deliveries each day. The emergency response became a national symbol of inadequate drought preparedness and generated intense public hostility. Ofwat responded in 1996 by freezing the company’s ability to raise bills, describing the measure as a penalty for failing to meet expected consumer standards. Yorkshire Water subsequently developed additional supply-balancing infrastructure, including a pipeline intended to move water between eastern and western parts of the region. Operational and environmental incidents continued to define scrutiny of the company. In 1992, a landslip at a sewage-sludge tip at Deighton near Huddersfield sent almost 20,000 tonnes of sludge onto the treatment works and blocked a section of the River Colne. In 2000, the company received its largest reported historic fine after pleading guilty to seventeen charges involving water deemed unfit for human consumption; the penalty was later reduced on appeal. In 2006, it pleaded guilty to offences involving discoloured water affecting around 1,200 Harrogate properties. In 2007, it was fined for pollution at Clifton Beck and for breaches of discharge consent at Neiley sewage works. A further incident involving a failed pump and sewage entering Whitby Harbour led to an Environment Agency investigation in 2008. Flood resilience has also been a recurring issue. During the 2007 Hull floods, the failure of the Bransholme pumping station attracted criticism because it was said to have worsened flooding affecting approximately 2,000 homes. The station was upgraded in 2016. In December 2022, a burst water main in Sheffield caused extensive flooding, water entered the local gas network and thousands of properties lost gas during sub-zero weather. The resulting emergency response included a major-incident declaration by Sheffield City Council. Alongside criticism, the company has recorded periods of improved service. Drinking-water samples reported for the year ending 31 March 2013 achieved a 99.93% compliance rate with UK standards. Yorkshire Water ranked eleventh among 21 water companies in Ofwat’s 2012–13 satisfaction comparison, while the 2015 UK Customer Service Index identified it as the leading organisation in the utilities sector and one of the country’s most improved organisations. These improvements did not remove continuing concerns over leakage, environmental performance, affordability and infrastructure resilience. The company remains a regulated regional utility whose future depends on reducing leakage, adapting to drought and extreme rainfall, upgrading wastewater assets and maintaining compliance with increasingly demanding environmental standards.
- 2022
Sheffield burst-main emergency
[1]A burst main contributes to flooding and a prolonged gas outage affecting thousands of properties.
- 2016
Bransholme pumping-station upgrade
[1]The pumping station criticised after the 2007 Hull floods is upgraded.
- 2008
Kelda Group acquisition
[1]Kelda Group, the parent associated with Yorkshire Water, is acquired by infrastructure funds.
- 1999
York Waterworks acquisition
[1]Yorkshire Water takes over York Waterworks Company, a historic water-only supplier serving York.
- 1996
Ofwat bill restriction
[1]Ofwat restricts the company’s ability to increase bills in response to inadequate service performance.
- 1995
Regional drought crisis
[1]Low western reservoirs require a large emergency tanker operation to transport water from eastern Yorkshire.
- 1992
Deighton sludge-tip disaster
[1]A landslip sends almost 20,000 tonnes of sewage sludge into the Deighton works and blocks the River Colne.
- 1989
Water industry privatisation
[1]The Water Act 1989 transfers the regional water business into a private-sector structure ahead of flotation.
- 1974
Yorkshire Water Authority begins operation
[1]The regional authority created under the Water Act 1973 begins operating as one of England’s regional water authorities.
Products and positioning
Regulated regional water and wastewater utility focused on essential public infrastructure, environmental compliance and resilience across Yorkshire and adjoining areas.
Water utility service
Drinking-water supply
Yorkshire Water abstracts, treats and distributes drinking water to households and businesses across its regulated region. The network includes reservoirs, treatment plants, trunk mains and local distribution systems serving urban and rural communities.
Water utility service
Wastewater and sewerage
The company collects wastewater through sewer networks and treats it at sewage works before discharge. The service also includes sludge handling, pumping stations and management of treatment-works discharge consents.
Infrastructure service
Drainage and flood infrastructure
Yorkshire Water operates drainage assets, pumping stations and related infrastructure that help manage wastewater and surface-water risks. Failures in this infrastructure have made flood resilience a significant public and regulatory issue.
Controversies
2022
Sheffield flooding and gas-network disruption
A burst water main released water into Sheffield’s gas network, causing a prolonged outage during freezing conditions and prompting a major-incident response.
2007
Environmental-law breaches
Yorkshire Water was fined over pollution entering Clifton Beck and breaches of discharge consent at Neiley sewage works.
1995
1995–96 drought response
Western reservoirs ran dry or critically low, leading to an emergency tanker operation and severe criticism of the company’s preparedness and service.
1992
Deighton sewage-sludge landslip
A landslip at a Huddersfield sewage-sludge tip sent almost 20,000 tonnes of sludge onto the works and blocked approximately 150 metres of the River Colne.
Brand decisions
2016
Upgrade Bransholme pumping stationOtherBackground
The station had been criticised after the 2007 Hull floods for failing during a period of severe flooding.
Action taken
Yorkshire Water upgraded the Bransholme pumping station.
Aftermath
The upgrade was intended to strengthen flood-management capacity in the affected Hull communities.
1996
Invest in east–west water balancingStrategyBackground
The 1995–96 drought exposed the vulnerability of western reservoirs and the limits of moving water by road.
Action taken
The company developed a pipeline and related infrastructure to improve the transfer of water between eastern and western parts of the region.
Aftermath
The investment was intended to improve drought resilience and reduce reliance on emergency tanker deliveries.
Recent events
Yorkshire Water announces CEO succession[2]
Reported:
Yorkshire Water announced that CEO Nicola Shaw will leave the role on 1 January and that Nicola Medalova will replace her.
Yorkshire Water receives lowest environmental rating[2]
Reported:
The Environment Agency gave Yorkshire Water one star out of four, its lowest possible environmental rating, and classed it as a poorly performing company. The article also reports that the agency attributed 260 pollution incidents in 2025 to the company.
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