SES Water Tap Water Quality Data

SES Water supplies water to Surrey and Sussex. We have data for 427 supply zones, sourced from the Drinking Water Inspectorate via the Stream open data initiative.

Check water quality by postcode

Latest available lab data for every UK postcode

Tap water quality by town

Water company lab results for nitrates, lead, chlorine and fluoride — browse all towns.

Browse towns →

Sewage spills by town

Environment Agency storm overflow counts and durations by town.

Browse towns →

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 →