tapwater.uk

UK Water Quality Data

What's in your tap water?

Independent reports for every UK postcode, based on government monitoring data.

Enter a full postcode or district code — e.g. SW1A 1AA, M1, B1

2,979Postcode areas
58M+Measurements
50+PFAS compounds
DailyUpdates

Areas of concern

Postcodes with the lowest water quality scores based on current monitoring data.

NG1Nottingham

Copper detected at 118 mg/L

3.4/10
Nottingham
B5Birmingham

Lead detected at 0.208 mg/L

4.8/10
Birmingham
L2Liverpool

Ammonia detected at 1.37 mg/L

6.0/10
Liverpool
L3Liverpool

Ammonia detected at 1.37 mg/L

6.0/10
Liverpool
NG7Nottingham

Coliform bacteria detected at 21 count/100ml

6.3/10
Nottingham

Highest rated areas

Postcodes with the cleanest water quality scores in our dataset.

SE1Southwark

No contaminants flagged — 6 tested

9.8/10
Southwark
E14Tower Hamlets

No contaminants flagged — 7 tested

9.8/10
Tower Hamlets
E1Hackney

No contaminants flagged — 6 tested

9.8/10
Hackney
N7Camden

No contaminants flagged — 8 tested

9.7/10
Camden
N1Camden

No contaminants flagged — 8 tested

9.7/10
Camden

Most checked areas

SW1AWestminster9.4E1Hackney9.8M1Manchester8.8B1BirminghamN/ALS1Leeds7.7BS1Bristol, City of6.4EH1City of EdinburghN/ACF10CardiffN/ANE1Newcastle upon Tyne7.0OX1Oxford7.5

Water suppliers

We track data from all major UK water companies

Thames Water15M customersSevern Trent8M customersUnited Utilities7M customersYorkshire Water5M customersAnglian Water4.5M customers