Latest available lab data for every UK postcode
DWI lab results for nitrates, lead, chlorine and fluoride — browse all towns.
Browse towns →
Environment Agency storm overflow counts and durations by town.
16
water companies covered
100,000+
zones mapped
DWI
real lab data
Data sourced from the Drinking Water Inspectorate via the Stream open data initiative
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 →