Thames Water

Water quality report — London and Thames Valley

8.2/10

Average score

Good

SW11

Lowest scored area

5.7/10

E14

Highest scored area

9.8/10

Contaminants flagged

across all areas

Water Quality Across Thames Water Area

Scores sorted by lowest first — worst quality at the top.

Postcode	Area	Score	Flagged	Status
SW11	Wandsworth	5.7/10	2	Fair
W4	Hounslow	5.7/10	2	Fair
SE15	Southwark	6.2/10	3	Fair
OX2	South Oxfordshire	6.3/10	2	Fair
NW10	Hammersmith and Fulham	6.5/10	2	Fair
W12	Hammersmith and Fulham	6.7/10	2	Fair
SW1V	Westminster	7.1/10	1	Good
SW3	Westminster	7.1/10	1	Good
SW7	Westminster	7.1/10	1	Good
W8	Kensington and Chelsea	7.1/10	1	Good
W2	Westminster	7.2/10	1	Good
SW15	Wandsworth	7.5/10	1	Good
SW18	Wandsworth	7.5/10	1	Good
OX1	Oxford	7.5/10	1	Good
SW6	Hammersmith and Fulham	7.9/10	1	Good
RG1	Wokingham	8.3/10	1	Good
SW19	Wandsworth	8.8/10	0	Good
NW3	Barnet	9/10	0	Excellent
SW1A	Westminster	9.4/10	0	Excellent
SE13	Greenwich	9.4/10	0	Excellent
NW1	Westminster	9.4/10	0	Excellent
SE10	Greenwich	9.5/10	0	Excellent
E2	Hackney	9.7/10	0	Excellent
E8	Hackney	9.7/10	0	Excellent
N1	Camden	9.7/10	0	Excellent
N7	Camden	9.7/10	0	Excellent
SE1	Southwark	9.8/10	0	Excellent
E1	Hackney	9.8/10	0	Excellent
E3	Newham	9.8/10	0	Excellent
E14	Tower Hamlets	9.8/10	0	Excellent

All postcode districts within Thames Water's supply network.