Are home water testing kits accurate?

DIY strip tests give a useful snapshot but are less precise than lab analysis. For definitive results, send a sample to an ISO 17025 accredited lab like Tap Score.

What should I test my water for?

At minimum, test for hardness, pH, chlorine, lead, and nitrates. If you are concerned about PFAS or microplastics, you will need a lab test as strip kits cannot detect these.

Water Testing Kits

Find out exactly what is in your water before deciding which filter to buy.

Best for: Anyone who wants data before spending money on filtration · £13–£80

Read our full guide: Best Water Testing Kit UK

Not sure which to pick? Check your water first.

Try your postcode — e.g. SW1A, M1, B1

Testing Kit

SimplexHealth 17-in-1 Water Test Kit

£13

4.1/5

Tests 17 parameters including lead, pH, and hardness
Results in 2 minutes with colour-match strips
Cheapest way to get a quick snapshot of your water

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Testing Kit

SJ WAVE 16-in-1 Premium Water Test

£15

4/5

150 strips included — enough for regular monthly testing
Tests bacteria, lead, iron, copper, and more
Clear colour chart printed on the bottle label

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Testing Kit

Tap Score Essential City Water Test

£80

4.7/5

ISO 17025 accredited lab — results you can trust
Tests 50+ parameters including PFAS and heavy metals
Online dashboard with personalised health recommendations

ISO 17025 accredited lab

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Common questions

Are home water testing kits accurate?: DIY strip tests give a useful snapshot but are less precise than lab analysis. For definitive results, send a sample to an ISO 17025 accredited lab like Tap Score.
What should I test my water for?: At minimum, test for hardness, pH, chlorine, lead, and nitrates. If you are concerned about PFAS or microplastics, you will need a lab test as strip kits cannot detect these.

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