Guides
Plain-English guides to what's in UK tap water, and our investigations into the water quality data companies hold.
Investigations
All guides
Thames Water postcode data
The Drinking Water Inspectorate refused to release Thames Water's postcode-to-supply-zone data on public safety grounds. Five weeks later, Thames Water disclosed the zone list and postcode mapping.
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Hard water and eczema
Does hard water worsen eczema? We look at the UK Biobank evidence and what it means for your skin.
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Nitrates and infant formula
Is boiled tap water safe for infant formula? Nitrates, lead and formula — what parents need to know.
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Water quality when buying a home
What your CON29DW search doesn't tell you about water quality. Lead pipes, nitrates and supply zones.
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Sewage spills near me
Find storm overflow and sewage spill data for your area, from Environment Agency monitoring for England and Wales.
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