Which Water Test Do I Need?
Start here if you are unsure what to test, whether one result is enough, or what to do next. SustainWater helps you screen, understand and act without the guesswork: choose a sensible starting test, use local context carefully, then interpret the result before deciding whether to retest, escalate or confirm with a laboratory.
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Start with your situation
The right water test depends on your source, symptom, certainty and next decision. Do not start with the biggest list of contaminants or the cheapest single strip. Start with the question you need the result to answer, then choose the narrowest route that can answer it safely.
- Unsure or several concerns: start with the Complete Drinking Water Test Kit as a broad first screen
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- Known contaminant: use Individual Water Tests for lead, E. coli, arsenic, fluoride or chlorine
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- Private supply: think source, treatment, storage, tap, result and next action before choosing
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- Taste, smell, colour or cloudiness: use the symptom route first, then test only if the result will change your next step
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- Already have a result: use the Result Interpretation Centre rather than buying another kit blindly
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- Need local context: use the UK water testing map for information and community context, not official monitoring
Complete screen or individual test?
The Complete Kit is strongest when you need a broad first screen, when more than one issue is possible, or when a private supply, older property, symptom change or local concern leaves the route unclear. Individual Water Tests are strongest when the concern is already specific and the result will answer a direct question at your tap.
- Choose the Complete Kit for broad uncertainty, mixed symptoms, private supplies or several household concerns
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- Choose the Lead Test when older pipework, lead pipes, fittings or disturbed plumbing are the specific concern
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- Choose the E. coli Test when bacteria, private supply contamination, flooding, storage or source disturbance are the concern
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- For mains water, sudden strong changes may need water-company contact before more home screening
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- For private supplies, council or laboratory confirmation may be needed where results affect safety, tenants, guests or treatment decisions
What to do after you choose
Testing is useful only if the result leads to a clear next action. Before you buy, decide whether you need reassurance, a first screen, a comparison before and after filtration, a retest, local context, supplier contact, council support or laboratory confirmation.
- Screen: choose the test route that matches source, symptom and contaminant
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- Understand: use the Result Interpretation Centre to compare result type, limits and uncertainty
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- Act: retest, monitor, contact a water company, contact a council or confirm with a lab where appropriate
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- Use the map to compare nearby community submissions and regional context, but never to prove your tap is safe or unsafe
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- If you are unsure after reading, start with the broad route and use interpretation support before escalating