Latest available lab data for every UK postcode
Water company lab results for nitrates, lead, chlorine and fluoride — browse all towns.
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Environment Agency storm overflow counts and durations by town.
16
water companies covered
100,000+
zones mapped
Official
lab data
Data from laboratory results published by UK water companies
How we got Thames Water's data →·Our data requests →
New baby at home?
Nitrates, lead and formula — what parents need to know
Parents hub →
Dry skin or eczema?
Hard water and skin — the evidence
Skin & health hub →
Just bought a house?
What to check before you exchange
Homebuyers hub →