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Scottish Water

Scotland has an area of 79,000 square kilometres and a coastline of over 11,000 kilometres. With a small and relatively dispersed population a large number of small water and waste water treatment works are required.

The company is the sole provider of water and waste water services to around 5 million customers in 2.4 million households. Thousands of assets are operated and maintained – over 47,000 kilometres of water pipes, 50,000 kilometres of sewer pipes, 1,837 waste water treatment works and 297 water treatment works plus pumping stations, sludge treatment centres, and reservoirs. Each day the company supplies 1.3 billion litres of clean water and nearly 1 billion litres of wastewater is taken away and treated before being returned to the rivers and seas.

Bonnycraig WTW (2024)

Ceramic membrane technology and modular build deliveries innovative solution that provides significant benefits and efficiencies

Braidholm Road Sewer Flood Alleviation (2024)

Project in Giffnock to alleviate internal and external sewer flooding by providing extra capacity and reducing pressure on the wastewater network

Central Borders Strategy (2024)

£30m upgrade to enhance water treatment and distribution in Central Borders for improved quality and reliability for local communities

Dunside Reservoirs (2024)

The removal of two reservoirs from the Reservoir Act

Hamilton WwTW (2024)

Installation of the UK’s first containerised mid-process hydroelectric turbine on a wastewater treatment works

Inveraray WTW (2024)

Installation of new control system replacing a 30 year-old existing system across four sites located in Argyll

Kerse Treated Water Storage Tank (2024)

New £6.5m water storage tank completed on schedule replacing 90 year-old asset

Loch Katrine Emergency Dam Project (2024)

A testament to engineering prowess and safety excellence

Marchmont Road Flood Alleviation Scheme (2024)

Flood alleviation measures provided in Edinburgh to combat internal and external flooding in Marchmont Road and Marchmont Crescent

Perth (Bertha Park) WwTW (2024)

Design and construction of modern sewage treatment facility to meet future population growth

Whitehall Distribution Service Reservoir (2023)

Whitehall Distribution Service Reservoir (DSR) is located on Stronsay, one of the north isles in Orkney, located 25 miles to the north of the Orkney mainland. The isle is home to 350 residents and is accessible by public ferry and plane. The Stronsay WTW that feeds the DSR is 300m to the south of the […]

Winchburgh WwTW (2023)

Winchburgh is located five miles west of Edinburgh Airport and the existing wastewater treatment works lies to the south-east of the town, approximately 200m from the nearest residential street. The site access road runs adjacent to the main Glasgow to Edinburgh railway line, the top of the embankment being a couple of metres from the […]

Bedersaig WTW (2021)

The small villages of Huisinis and Gobhaig on the Isle of Harris each consist of a few households, but in the summer months the local beach is inundated with campers and campervans. This means that the water demand fluctuates dramatically through the year. The two villages were served by single, basic supplies: Huisinis by a […]

C1a Project (2021)

The Ayrshire Strategic Resilience Programme involves the transfer of water from the Milngavie WTW, located north of Glasgow, to the Ayrshire and East Renfrewshire regions southwest of the city, increasing resilience for approximately one million customers. Phase 1 (Amlaird & Gorbals) was completed in 2018 and Phase 2 (Highlees) will be completed in 2021. Phase […]

Craighead WTW (2021)

Craighead WTW is a new water treatment works located on a greenfield site close to the existing works in the north-east of Scotland. The project objective is to improve the treatment of water to the customers of the town of Huntley and surrounding areas. The existing Craighead WTW has reached the end of its economic […]

Rosebery WTW (2021)

Located in Temple, near Gorebridge, in Midlothian, Scotland, Rosebery WTW treats raw water sourced from Megget and Gladhouse Reservoirs which is blended at the works inlet. The blended raw water is generally low in turbidity (2.0 NTU 95%ile), moderate colour (63 mg/l Pt/Co 95%ile), with average to high metals concentrations (55 to 300ug/l Mn, Al, […]

Invercannie WTW (2020)

Located to the West of the town of Banchory, Aberdeenshire, Scottish Water’s Invercannie WTW is currently a 49 Ml/d water treatment works which serves the local population as well as providing raw and treated water to Mannofield WTW in Aberdeen via two 28km aqueducts (one laid in 1866 and the other in 1924). The treatment […]

Loch Venachar Fish Pass (2020)

Loch Venachar Reservoir is located near Callander in Loch Lomond and the Trossachs National Park. The reservoir was formed in 1859 under the direction of civil engineer John Frederick Bateman (1810-1889), when the existing loch level was raised by the construction of a masonry dam across the outlet from the loch known as the Eas […]

Roundknowe CRFP (2020)

In 2017, aBV – a joint venture between Amey and Black and Veatch (now Binnies), and Environmental Techniques Ltd approached client Scottish Water about utilising carbon fibre (CFRP) and glass fibre (GFRP) to provide a 60-year rehabilitation technique to an existing pipe bridge; an approach that has never been used before in the UK Water […]

Tarbert WTW (2020)

Tarbert WTW is located on the edge of Loch Fyne, an inland sea loch, west of the small village of Tarbert in Argyll & Bute. The water treatment works is supplied from the Loch a’ Chaorainn located 5 miles north-west of the treatment works, serving a population of approximately 3,000. To remove the risk of […]

Uig WTW is located on the west coast of Lewis and provides potable water to the community of around 500 residents, with a significant tourist increase in the summer months. The works are gravity-fed by a high-level loch around 2km from the site. Treated water is then pumped from the water treatment works to a […]

Ardersier WwTW (2019)

Ardersier is located on the Moray Firth some 11 miles east of Inverness. The wastewater treatment works serves the town of Ardersier and the surrounding area including Inverness Airport and Fort George Barracks. It currently serves a population of less than 2,000 but there are significant developments planned in the area with a long-term future […]

Bradan WTW (2019)

Located in South Ayrshire, Scotland, Bradan Water Treatment Works (WTW) has a capacity of 120 Ml/day, with an output of approximately 70 Ml/day. The existing treatment processes comprise aluminium sulphate coagulation, dissolved air flotation, primary filtration, manganese contactors, orthophosphate dosing, lime and disinfection. The works supplies a large area along the west coast of Scotland, […]

Glenlatterach WTW (2019)

Located south of the town of Elgin in the north east of Scotland, Scottish Water’s Glenlatterach WTW is situated in the heart of Speyside, home to some of Scotland’s most beautiful scenery as well as roughly half of all of the whisky distilleries operating in Scotland. Raw water is abstracted from the Glenlatterach Reservoir and […]

Inverurie WwTW (2019)

Inverurie Wastewater Treatment Works lies on the banks of the River Don in Aberdeenshire, at the confluence with the River Urie, and serves a current population of approximately 28,000 people with substantial future growth within the catchment forecasted. This project has been initiated by Scottish Water to provide compliance with new nutrient discharge consents under […]

Loch Ness Regional WTW (2019)

Loch Ness Regional is a new multi-site £22m water treatment works and infrastructure project for Scottish Water improving the water supply to their customers from the villages of Fort Augustus and Invermoriston, both to the south of Inverness. Located on the banks of Loch Ness, the project’s objective is to improve the treatment of water […]

Lochmaddy WTW (2019)

Lochmaddy is the main town located on North Uist, which is one of the islands forming part of the Western Isles. This project involved the design, installation, construction and commissioning of a new water treatment works (WTW) on a greenfield site beside the existing site. Additionally, some of the works were within South Lewis, Harris […]

Paisley Tunnel Project (2019)

Scottish Water’s £17m Paisley Environmental Project, which started in October 2016, is the largest of its kind that Scottish Water has ever made in Renfrewshire. The project is part of the company’s £250m, six-year programme of work, launched in 2013, to improve river water quality and the natural environment and tackle flooding across the Greater […]

Stromness Wastewater Network (2019)

Stromness is a town situated around the sheltered bay of Hamnavoe on the west of Orkney’s mainland. It has a population of approximately 2200 inhabitants and a population equivalent (PE) of 2,600, due to the local industry; which is expected to grow to 3,600 in the years ahead. The town has a dramatic and unique […]

Ayrshire Resilience Scheme: Phase 2 Highlees (2018)

During investment period 2016/17, Scottish Water commenced the first phase of construction on a £120m investment project known as the Ayrshire Resilience Scheme, designed to improve the resilience of the drinking water network throughout much of Ayrshire and parts of East Renfrewshire. Once complete, this scheme will benefit more than 200,000 Scottish Water customers. Caledonia […]

Inverurie WwTW (2018)

Inverurie WwTW is located in Aberdeenshire in the north-east of Scotland and provides sewage treatment for Inverurie and the surrounding area including Blackburn, Kintore and Port Elphinstone. It currently serves a population of 28,000, but Inverurie is one of the most rapidly growing towns in terms of population in the UK, with an estimated population […]

Lochaline Water Quality Upgrade Project (2018)

The Lochaline Water Quality Upgrade Project required the design and delivery of a whole new water treatment works at Lochaline in the remote Morven Peninsula. A modern and compact membrane based treatment technology was selected which would support a rapid and efficient delivery strategy. The key to the delivery strategy was an on off-site modular […]

South Edinburgh Service Resilience (2018)

Caledonia Water Alliance (CWA) has been tasked with improving the water infrastructure network within Edinburgh and the Lothians, in partnership with Scottish Water. The Scottish Water project driver is CS16WR for Water Systems Resilience; associated with improving resilience of network supply. The project objective is to provide resilience in the wider water distribution network linked […]

Swinstie Pipe Bridge Replacement (2018)

The existing Swinstie Pipe Bridge is located near Cleland, North Lanarkshire, and the structure supports a 450mm diameter iron gravity sewer pipe across the narrow, steep sided river valley of the Swinstie Burn towards Swinstie WwTW. The existing pipe bridge dates from the 1950s and has exhibited signs of severe distress for a number of […]

Gorbals Pumping Station and Drumboy Hill DSR (2017)

Scottish Water has undertaken a £120m drinking water improvement scheme in Ayrshire to meet water quality compliance objectives and provide increased resilience of supply to five operational areas. The scheme involves the transfer of water from the Milngavie WTW located north of Glasgow to the Ayrshire region southwest of the city. The scheme makes use […]

Irvine Bypass Trunk Main (2017)

An existing, but ageing, 33”-36” diameter potable water main supplying over 40,000 customers in Ayrshire was identified by Scottish Water as requiring replacement. The existing pipeline was to be replaced with a new pipeline constructed of polyethylene (PE) pipe sections butt-fusion welded into 200m long pipe strings. Caledonia Water Alliance (CWA), a joint venture between […]

Island of Iona - Seabed Water Supply Pipeline (2017)

The small island of Iona itself lies off the Isle of Mull in the Inner Hebrides off the west coast and is widely regarded as the birthplace of Christianity in Scotland. To the current day, Iona and its monastery has been a renowned centre of religious learning and pilgrimage and the Abbey is one of […]

Ayrshire Resilience: Phase 1 (2016)

Scottish Water has recently commenced the first phase of construction on a £120m investment project designed to improve the drinking water network throughout much of Ayrshire and parts of East Renfrewshire. The project involves the installation of a new large diameter strategic water main from Newton Mearns continuing down towards the Fenwick/Waterside area and finally […]

Elmvale Row Sewer Flooding Prevention Scheme (2016)

Elmvale Row is located in the Springburn area in the North of Glasgow City and is comprised of three and four storey residential tenement buildings and residential parking. Land use in the surrounding area includes commercial, residential, parkland and a primary school. The topography of the area and capacity of the existing sewer system has […]

Heat from Wastewater (2016)

Innovative scheme at Borders college campus in Galashiels to supply 1.8GWh of heat per annum

Scottish Water Development Centres (2016)

Scotland’s first dedicated water and wastewater technology testing facilities

Shieldhall Tunnel (2016)

Construction of the Shieldhall Tunnel, the biggest investment in the Glasgow wastewater network since Victorian times, is well underway. Once complete, it will improve river water quality and the natural environment of the River Clyde and its tributaries, enable the Greater Glasgow area to grow and develop, alleviate sewer flooding key locations and deal with […]

Boat of Garten WwTW (2015)

First below ground structures using DfMA including pre-installed M&E kit & corporate responsibility/environmental best practice

Forehill WTW (2015)

Off site MEICA Construction

Loch Arklet Reservoir (2015)

Largest anchoring scheme for Scottish Water

Mauchline STW (2015)

Fully innovative design for manufacture & assembly approach to new assets

Penwhapple Reservoir (2015)

First ever precast spillway for Scottish Water

Cowdenbeath Wetlands (2014)

A sustainable wetland provides Scottish Water with an asset that treats stormwater overflows & provides a habitat for a wide variety of wildlife

Laigh, Shieldpark & Dalamarnock STWs -Bundle 25A (2014)

Scottish Water’s Bundle 25A project improves water quality of the River Clyde and its tributaries

Supply Demand Balance South Programme (2014)

Scottish Water’s measures to ensure resilience of supply for customers in Dumfries and Galloway

Talla Aqueduct (2014)

Overflow chamber stabilisation

Black Esk Reservoir Dam Raising (2013)

Raising the height of a reservoir and bell-mouth spillway required innovative thinking

Carron Valley Mains (2013)

Improving water quality in central Scotland

Cumbernauld SuDS (2013)

New SuDS detention ponds to treat surface water from an industrial park to improve water quality

Fyne Process (2013)

Ultra-filtration technology for the treatment of variable surface water quality

Katrine Aqueduct Refurbishment (2013)

Essential capital maintenance refurbishment of a strategic raw water supply

Meadowhead & Stevenston Stormwater Transfer (2013)

New stormwater drainage systems improve quality of rivers and bathing water in Kilmarnock & Irvine

Airdrie Environmental Project (2012)

One of Scottish Water’s flagship environmental projects for the 2010-2015 investment period is completed on time and under budget

Ardbeg & Port Bannatyne Sewerage Scheme (2012)

£6m Scottish Water project to remove untreated sewage sea outfalls on the Isle of Bute

Glencorse WTW (2012)

Edinburgh’s new £130m WTW is a feat of modern construction methods and sustainable engineering

Hydropower Generating Scheme (2012)

Hydro project will provide Scottish Water with self-generated power for their assets

Package Membrane Plants for Remote Areas (2012)

Fyne process removes colour and impurities from raw surface water with no environmental impact

River Avon Project (2012)

Significant upgrades to 5 WwTWs to protect the natural environment & deliver long term benefits

Seafield WwTW (2012)

Inlet works and odour improvement projects at the largest WwTW in East Scotland

Ayrshire Bradan A Water Mains DW5 (2011)

Quality enhancements to 1,200km of water mains in Ayrshire through a variety of intervention techniques

Carbarns WwTW (2011)

Project to provide growth, quality & capital maintenance improvements

Dunoon WwTW (2011)

£34m investment in new sewerage collection, transfer & treatment scheme on the Cowal Peninsula

Forth Replacement Crossing (2011)

Relocation of the Port Edgar long sea outfall

Loch Ryan Wastewater Treatment Scheme (2011)

£28m investment to deliver a wastewater solution for Stranraer and the surrounding villages

Assynt WTW (2010)

New water treatment works for the Inverness region

Burncrooks WTW (2010)

Alternative to secondary treatment plant saves millions

Glencorse WTW (2010)

£125m investment to improve water supply to Scotland’s capital

Hawick Cluster Water Supply (2010)

A £10m integrated solution to improve drinking water quality in the Scottish Borders

Park Avenue FAS (2010)

£2.4m project sets a new benchmark within Scottish Water for customer care and delivery

Tiree WTW (2010)

Protecting unique habitat key focus for island project team

Troqueer WwTW (2010)

£10m scheme to deliver capital maintenance, growth and odour control

Turret WTW (2010)

£24m upgrade & refurbishment project

Badentinan WTW (2009)

Improved water treatment in the Elgin and east coastal area

Ballater WTW (2009)

Capital investment programme to upgrade existing water treatment works

Clatto WTW (2009)

£5.1m scheme to secure and improve water treatment for Dundee area

Glencorse WTW (2009)

Pipe production facility bringing major benefits to Edinburgh scheme

Glenfarg WTW (2009)

£4.3m upgrade scheme to improve water treatment in Fife

Invercannie & Mannofield WTWs (2009)

£41m scheme to improve water treatment for Aberdeen

Kirkcaldy WwTW (2009)

£4.4m scheme to tackle odour issues in Fife town

Loch Ewe Bank First Time Provision (2009)

£15.4m scheme to provide first time sewerage in Scottish Highlands

North Queensferry WwTW (2009)

£1.95m project to replace dilapidated works

UID Programme 2008-2009 (2009)

£30m scheme to reduce environmental impact in central belt of Scotland

Corsehouse WTW (2008)

£7.5m project to upgrade water quality in Ayrshire

Dunbar WwTW (2008)

A new treatment works for a historic coastal town

Fort William WTW (2008)

Improved water treatment in the West Highlands

Katrine WTW (2008)

700,000 residents of Greater Glasgow delighted with new works

Kilmelford WTW (2008)

£2.2m project improves Highlands water quality

Kyle & Lochalsh Water Supply (2008)

£5.5 million regional water supply project

Lomond Hills WTW (2008)

£7.6m project to bring water quality improvements to Fife

North Kessock Wastewater Transfer Scheme (2008)

£4m solution for environmentally sensitive area

Tyndrum WTW (2008)

£5.2m scheme brings improved treatment in Scottish Highlands

Hamilton WwTW (2007)

£5m project is final part of scheme to clean up River Clyde

Invercannie & Mannofield WTWs (2007)

£38m scheme to improve water supplies in Aberdeen

Loch Eck WTW (2007)

£8.4 investment improves quality

Port Wemyss & Portnahaven STW (2007)

£2.2m project has environmental benefits for island community

Stewarton WwTW (2007)

£1.1m project enhances water quality in west of Scotland

Stirling WwTW (2007)

Site clearance & plant diversions prior to SBR installation

Tobermory STW (2007)

£6.8m provides new wastewater, collection, transfer & treatment

Alnwickhill Clearwater Tanks (2006)

Rectifying low-level bacterial failures

Alva WwTW (2006)

Final cost achieved £1.836m opposed to Capital provision £3.2m

Drum Vacuum Sewerage Scheme (2006)

First time scheme for rural community

Glasgow Strategic Drainage Plan (2006)

Dealing with the legacy and providing for the future

Granish (Aviemore) WwTW (2006)

£7m allocated for new works in top tourist area

Methlick WwTW (2006)

Providing new WwTW with minimum disruption

Pitscottie WwTW (2006)

Underground SAF solves rural WwTW problem

Rosebery WTW (2006)

£8.6m budgeted project at critical works

Royal Mile (Edinburgh) Mains Rehabilitation (2006)

Water mains renewals – a challenge in historic centre

Thurso WwTW (2006)

£12.56m project completed within 14 months – under budget

Dunoon WwTW (2005)

£18m scheme aids SW’s operational & environmental objectives

Lochgoilhead WwTW (2005)

£1.9m scheme to protect the environment

Packaged Membranes Plant (2005)

Fyne membrane plant in a pre-fab building speeds installation

Phillipshill WwTW (2005)

Increasing treatment capacity & curing overloading problems

Rosebery WTW (2005)

Intensified DAF process helps increase capacity

Tay WwTW (2005)

Ensuring estuary bound effluent meets new SEPA requirement

Glasgow Strategic Drainage Plan (2004)

Study to end flooding, improve environment & amenities

Invercannie WTW (2004)

£10.5m membrane plant improves Aberdeen water quality

Linwood & Johnstone WwTW (2004)

£20.6m aids Scottish Water’s operational & environmental objectives

Out Skerries WTW (2004)

Tough challenge on remote Scottish Island

Wick WwTW (2004)

First time WwTW on exposed headland for Highland town

Cromarty & Gairloch Drainage Schemes (2003)

Scottish Water brings high-tech to the Highlands

Esk Valley CSOs (2003)

Major scheme to improve quality of water courses, access areas

Loch Katrine & Loch Lomond Pilot Plants (2003)

Investigating feasibility of blending waters of two lochs

Munlochy & Avoch STW (2003)

Upgrade & remediation of Scottish Highland RBC plant

North Coast Regional Scheme (2003)

£28.5 regional scheme improves water quality in NE corner of UK

Aberdeen Nigg STC (2002)

Large thermal hydrolysis plant for Nigg STC

Auchneel WTW (2002)

Auchneel WTW is situated just to the north west of Stranraer and treats soft upland waters from three reservoirs, Upper and Lower Dindinnie and Knockquhassan Reservoirs

Benbecula STW (2002)

New STW & sewerage for Scots island township

Coastal Communities Stormwater Management (2002)

Storm water management in small west coast communities

Cramond Wastewater Improvement Scheme (2002)

£4.5m project to end untreated discharge into Firth of Forth

Forth Valley Rural WTW (2002)

Remote rural WTWs using membrane plants

Inverness WTW (2002)

New ultra filtration process provides cryptosporidium barrier

Katrine Water Supply Project (2002)

£100m ‘flagship’project to upgrade water supply for 700,000

Kirkwall WwTW (2002)

Novel SBR system for Orkney Island plant

Meadowhead, Stevenston & Inverclyde STWs (2002)

Three sewage treatment plants come on line in one single project

Moray Watewater Project (2002)

£60m capital investment in the far north of Scotland

Pathogen Protection at Groundwater Sources (2002)

Pathogen protection using ultrafiltration at rural ground water supply

Penicuik WwTW (2002)

Extension/upgrade presented many challenges

Stirling WwTW (2002)

New pumping station & associated works

Sanday Sludge Remediation (2024)

Sludge storage area & drying beds remediation project on Orkney to maximise social value for locals and tourists alike