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Water quality in South West England

Water quality across Devon, Cornwall, Somerset, Dorset and Bristol. Supplied by South West Water, Wessex Water, and Bristol Water.

According to TapWater.uk's analysis, South West England scores 9.0/10 for drinking water quality in 2026, based on data from 38 postcode districts.

9.0

Avg score /10

38

Areas tested

3

Suppliers

1

PFAS detections

Tap water in South West England has an average safety score of 9.0 out of 10 based on testing across 38 postcode districts. Water is supplied by Bristol Water, South West Water, Wessex Water. PFAS (forever chemicals) have been detected in 1 areas. The overall water quality is good. Data is sourced from the Environment Agency and water company testing via the Stream Water Data Portal.

Try your postcode — e.g. SW1A, M1, B1

Cities in South West England

Average water quality score by city.

Plymouth

4 areas tested

9.6

Exeter

3 areas tested

9.4

Bath

3 areas tested

9.0

Bristol

28 areas tested

8.8

Areas to watch

BS9Bristol, City of5.6BS11Bristol, City of5.6BS25North Somerset6.3BS41North Somerset6.7BS23North Somerset7.6

Cleanest water

BS7Bristol, City of9.9BS40North Somerset9.8BS16Bristol, City of9.8BA3Bath and North East Somerset9.7BS13North Somerset9.7

Water suppliers

Bristol Water28 areasSouth West Water7 areasWessex Water3 areas

All postcode areas in South West England

Every postcode district we monitor in this region.

BA1BA3BS1BS10BS11BS13BS14BS15BS16BS2BS20BS21BS22BS23BS24BS25BS26BS29BS3BS31BS39BS4BS40BS41BS48BS49BS5BS6BS7BS8BS9EX1EX3EX5PL1PL2PL3PL4
Data sourced from the Environment Agency Water Quality Archive and water company testing via the Stream Water Data Portal. See our methodology for how scores are calculated.Reviewed by the TapWater.uk research team