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Built with researchers at Imperial College London

WaterGraph Guard

Stay in the loop

Water quality monitoring for your home: two tests six months apart, plus alerts all year if any issues arise in your water network.

£59 a year

Get Guard

Renews yearly, cancel any time

A white mews house in London

Test

Your home

Clear

Nothing over UK health limits. No readings need attention.

Your tap's water on 3 September 2026. Nothing to watch closely, and some wellness factors to know.

Home monitored

Guard

Your next kit posts in March. We are watching your water network and will email you the moment anything changes.

Guard your tap.

WaterGraph Guard gives you two lab tests of your own tap a year, so you know what's in your water, not just what's happening around it.

Your year with Guard

The WaterGraph test kit: a box and two sample bottles

  1. Now

    Your first test. Results within 3 working days of your sample reaching our lab, with your Water Health Score and a Care Plan.

  2. All year

    We watch your water network and email you if something changes that could affect your home.

  3. Six months

    Your second kit arrives automatically.

  4. Twelve months

    Guard renews at £59 a year. Cancel any time.

Test, Guard or Premium?

Test

£49

One lab test of your tap

  • Results within 3 working days of your sample reaching our lab
  • A Care Plan: what to fix, and how
  • Free postage both ways
  • Extra tests £49 each
How many taps?

Guard

Best value

£59

Two tests six months apart, plus alerts all year

  • Everything in Test
  • A second test posted in six months
  • We watch your water network all year. We send you alerts if there's an issue
  • Extra tests £29 each
How many taps?

Renews yearly, cancel any time

Premium

£399

Guard plus a PFAS test

  • Everything in Guard
  • A lab test for 50 PFAS (forever chemicals)
  • Extra standard tests £29 each
How many taps? One tap only for PFAS

Then renews as Guard at £59 a year

Guard FAQs

What is WaterGraph Guard?

A year of cover for your home's water: a test now, a second posted to you in six months, and monitoring in between. We watch your home's water network all year, including other WaterGraph tests near you, and you're the first to know if there's an issue.

What happens at six months?

We post your second kit automatically to the address on file. Nothing to remember.

What does monitoring mean?

We watch the readings around your home, from your own tests, other WaterGraph tests nearby, and the water network. If something changes that could affect your home, we email you.

Does Guard renew?

Yes, yearly at £59, and you can cancel any time from your report or by replying to any email from us.

I bought a Test. Can I add Guard later?

Yes. For 30 days after your results, your report offers Guard for just £10, and your first test counts as the first of the two.

How do I test for forever chemicals?

With WaterGraph Premium: everything in Guard, plus a lab test for 50 PFAS (forever chemicals). It's £399, then renews as Guard at £59 a year.

All FAQs More about PFAS

We don't sell water filters or take payment to recommend products. We offer a screening test, not a certificate that your water is safe.

Built with researchers at Imperial College London. Rated Excellent on Trustpilot. Hundreds of customers making informed decisions about the water in their home.

A year of cover for your home's water

For £59 you receive a test now, a second posted to you in six months, and monitoring all year round.

Get Guard