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
Built with researchers at Imperial College London
WaterGraph Premium
A PFAS water test for your tap
PFAS are forever chemicals: man-made chemicals that barely break down, so they build up in water and in our bodies.
WaterGraph Premium is £399: everything in Guard, plus a lab test for 50 PFAS on one tap. It renews as Guard at £59 a year.
£399 for the first year
Get PremiumPFAS results 4 to 5 weeks after you post your sample
Test
Your home
Attention
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.
PFAS (forever chemicals)
50 PFAS, tested by a specialist lab
Are there forever chemicals (PFAS) in UK tap water?
Yes, in trace amounts. A 2026 Imperial College London survey found PFAS present in London tap water, though within UK and EU safety limits.
England and Wales have no legal limit yet. The Drinking Water Inspectorate's guideline is 0.1 micrograms per litre for the total of 48 PFAS that water companies test for, and the government has said it will consult on a legal limit. It says there's no evidence of PFAS above permitted levels in England and Wales.
Those are figures for your area's supply. Only a test of your own tap shows what's coming out of it.
Sources: Drinking Water Inspectorate · GOV.UK · Imperial College London
How the PFAS test works
Your PFAS kit has its own two bottles, made without PFAS. Fill them from one tap, following the card in the box, and post them back to us. A specialist partner lab tests your sample for 50 PFAS, and your results come 4 to 5 weeks after you post it, set against the Drinking Water Inspectorate's guideline. Premium also includes everything in Guard.
£399
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Test, Guard or Premium?
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
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
Then renews as Guard at £59 a year
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PFAS testing FAQs
Do Test and Guard test for PFAS?
No. PFAS (forever chemicals) testing is only in WaterGraph Premium.
Which PFAS do you test for?
50 PFAS, including the 48 the Drinking Water Inspectorate tells water companies to monitor. We add up those 48 and compare the total with its guideline of 0.1 micrograms per litre.
How long do PFAS results take?
4 to 5 weeks after you post your sample, as a specialist lab takes about three weeks to analyse it. Allow longer over Christmas. Your other results arrive within 3 working days of your sample reaching our lab.
Who tests my PFAS sample?
A specialist partner lab. The 8 key things are tested in our own lab in London.
Is PFAS part of my Water Health Score?
Not yet. Your PFAS result is reported on its own, next to your score.
Can I upgrade to Premium?
Yes, any time. If you already have Test or Guard, you pay the difference.
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.