Built with researchers at Imperial College London
Example report
Water test results, explained
An example WaterGraph report: what we found at the tap, what it means, and what to do about it. Buckingham Palace is our demo address. We haven't tested its water.
Test
Buckingham Palace
Nothing over UK health limits. However two readings need attention.
Your tap's water on 8 September 2026. Two readings to watch as the seasons change, and some wellness factors to know.
How to read your report
Your Water Health Score
One number for your water, scored against UK limits and typical UK levels, with our method published. It turns 8 readings into one 0–100 number you can track, compare, and improve.
Three verdicts, set by your readings
The verdict at the top of your report comes from your readings, not from your score. So a high score can still come with Attention. Very hard water, for example, has no UK health limit, but it's worth reviewing for wellness.
- ClearEvery reading is in range.
- AttentionNothing over a UK health limit, but at least one reading needs attention.
- Action NeededLead found, or a reading over a UK health limit.
Every reading, explained
Each of the 8 key things, with its UK limit and what it means for your home, in plain English.

Your Care Plan
A plain-English action list built from your results and your goals: what's fine, what needs attention, and the exact next step for each, free actions first.

If we find lead
If lead is detected at any level, the score is capped at 40, Action Needed, for as long as it remains. Where a reading points to a possible compliance issue, we tell you plainly and we always recommend an accredited lab test to confirm it.

Get your own report
A lab test of your tap water, your Water Health Score and a Care Plan, posted UK-wide. From £49.
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Results within 3 working days of your sample reaching our lab