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Built with researchers at Imperial College London

About WaterGraph

Independent water testing for UK homes

WaterGraph is an independent water testing service for UK homes. Our postal lab tests show you what's in your tap water, with a Water Health Score and a personalised Care Plan that explains what to do about it.

WaterGraph is run by Cambridge Lakehouse Ltd, a family-owned and family-run company.

Hugh Fraser (Co-Founder & CEO) and Dr Ralph St Clair Wade (COO & Chief Research Officer) lead the team, advised by Prof Adrian Butler and Dr Tom Rowan of Imperial College London.

A mother passing her young child a glass of water in a home kitchen

Independent by design

We don't sell water filters or take payment to recommend products. Every recommendation is chosen on your readings, your goals and the evidence for what works.

Our lab

We test your sample in our lab at Somerset House, London. WaterGraph Premium's PFAS (forever chemicals) tests go to a specialist partner lab.

WaterGraph is a water screening service. We regularly perform control tests to ensure that our accuracy remains high. Our processes have been built with researchers at Imperial College London. We don't certify water as safe for drinking, and we don't offer a UKAS-accredited laboratory service.

Lab water testing

Our team

Hugh Fraser

Hugh Fraser

Co-Founder & CEO

Hugh is a serial entrepreneur who joins Cambridge Lakehouse from Doorway.io, where as Co-Founder & Managing Partner he took the company from early concept to over $1 million in annual recurring revenue. With a background spanning technology, security and client experience, he brings a founder's instinct for identifying friction in established processes and building elegant solutions to replace them.

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His experience across multiple early-stage ventures has given Hugh a sharp appreciation of what it takes to bring new products to market, build teams and win the trust of enterprise clients. At Doorway, he championed a digital-first approach to professional relationships, helping organisations move beyond outdated contact methods towards seamless, secure and sustainable alternatives.

Benjie Fraser

Benjie Fraser

Co-Founder & Chairman

Benjie brings over three decades of experience in financial services, asset servicing and institutional investment to his role as Chairman. His career spans some of the world's leading financial institutions, including 15 years at J.P. Morgan as Managing Director and Global Pensions Executive, where he held oversight of the asset servicing of $2.2 trillion in pension assets worldwide. Prior to that, he held senior roles at State Street, Bank of New York and Boston Safe Mellon.

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Throughout his career, Benjie has been a prominent voice on the issues shaping institutional investment, from ESG and stewardship to data governance, regulatory change and the evolving responsibilities of asset owners. He has spoken at industry events across Europe, Australia, Japan, the Middle East, the US and beyond, and has been a consistent advocate for better alignment between asset owners, managers and issuers to drive long-term, sustainable value.

Dr Ralph St Clair Wade

Dr Ralph St Clair Wade

COO & Chief Research Officer

Leads on research and operations at WaterGraph's parent, Cambridge Lakehouse. Formerly Managing Partner of CambridgeCultura, a Cambridge research and insights spinout accredited by the Crown Commercial Service, and a Cambridge-funded visiting specialist at UNESCO. He took the top result in his year at St John's College, Cambridge, where he held two doctoral scholarships. He is an Affiliated Lecturer at the University of Cambridge.

Prof Adrian Butler

Prof Adrian Butler

Advisor

Professor of Subsurface Hydrology, Imperial College London

Professor of Subsurface Hydrology at Imperial College London, specialising in subsurface water flow and contaminant transport, including the Chalk aquifers of Southern England. He works closely with the British Geological Survey and is Principal Investigator on the NERC-funded CAMELLIA project.

Dr Tom Rowan

Dr Tom Rowan

Advisor

Assistant Professor, Imperial College London

Nearly seven years advancing simulation tools and field instrumentation for water systems, combining low-cost sensor design with AI to tackle pollution and water security. His early-warning sensor research was highlighted by the American Geophysical Union. PhD in Fluid Mechanics at Durham, with postdoctoral research at Durham and Imperial.

WaterGraph FAQs

Is there an independent lab that tests home tap water in the UK?

Yes. WaterGraph is an independent water testing service for UK homes. It works by post: we send you a kit, you post your sample back, and we test it in our lab in London. We don't sell water filters or take payment to recommend products. Ours is a screening test: for regulatory-grade confirmation, an accredited laboratory test is the next step.

Is WaterGraph independent?

Yes. We don't sell water filters or take payment to recommend products, and no filter company or retailer has any say in your Care Plan. WaterGraph is run by Cambridge Lakehouse Ltd, a family-owned and family-run company.

Where is WaterGraph based?

We are based in London. Our lab is at Somerset House, and we test by post, UK-wide.

Get in touch

WaterGraph, Somerset House, Victoria Embankment, London, WC2R 1LA

Email us at hello@watergraph.co.uk

Test your tap

A lab test of your tap water, your Water Health Score and a Care Plan, posted UK-wide. From £49.

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