Watermark your home
Independent water certification - built with researchers at Imperial College. £29 for two tests, six months apart.
Real homes. Real verdicts.
“My filter wasn't doing its job. I'd been paying for it for two years.”Sophie, New Forest
“He tested in our kitchen while the kids watched. Walked us through every reading.”Doone, New Forest
“A real answer, with what to do about it. Not a strip kit and a shrug.”Shaun, near Southampton
Twenty minutes. Three steps.
A WaterGraph engineer comes to your home, often co-founder Hugh himself. Twenty minutes. Tests your kitchen tap for nine specific parameters in front of you.
One of three verdicts: Clear, Attention, or Action Required. On your phone. Date-stamped. Renewable every six months.
Every reading explained. Ranked recommendations with the reasoning attached. From independent efficacy research, never commercial relationships.
Pay only when you receive your results.
Built with researchers at Imperial College.
WaterGraph is a Cambridge Lakehouse company, working with researchers at Imperial College. Our methodology is independent, peer-reviewable, and benchmarked against UK and WHO drinking-water standards.
We don't sell filters. We don't take affiliate revenue. The Watermark is the product. The recommendations are independent.
Watermark your home
£29 for two tests, six months apart.
Book Your Water TestPay only when you receive your results.
New Forest properties only.