WaterHard.uk

Water Hardness in Cardiff

Cardiff, Wales • 36 postcode districts

0 200 400 68 ppm
Slightly Hard

The average water hardness in Cardiff is 68 ppm, classified as slightly hard. Cardiff is served by Welsh Water (Dwr Cymru), covering 36 postcode districts across Cardiff in the Wales region.

Hardness varies across the area — see the table below for a breakdown by postcode district.

Water Hardness by Postcode in Cardiff

Postcode Water Company Hardness PPM Level
CF39 Welsh Water (Dwr Cymru)
109 ppm
109 ppm Slightly Hard
CF38 Welsh Water (Dwr Cymru)
108 ppm
108 ppm Slightly Hard
CF37 Welsh Water (Dwr Cymru)
107 ppm
107 ppm Slightly Hard
CF36 Welsh Water (Dwr Cymru)
106 ppm
106 ppm Slightly Hard
CF35 Welsh Water (Dwr Cymru)
105 ppm
105 ppm Slightly Hard
CF34 Welsh Water (Dwr Cymru)
104 ppm
104 ppm Slightly Hard
CF33 Welsh Water (Dwr Cymru)
103 ppm
103 ppm Slightly Hard
CF32 Welsh Water (Dwr Cymru)
102 ppm
102 ppm Slightly Hard
CF64 Welsh Water (Dwr Cymru)
102 ppm
102 ppm Slightly Hard
CF31 Welsh Water (Dwr Cymru)
101 ppm
101 ppm Slightly Hard
CF63 Welsh Water (Dwr Cymru)
101 ppm
101 ppm Slightly Hard
CF62 Welsh Water (Dwr Cymru)
100 ppm
100 ppm Slightly Hard
CF61 Welsh Water (Dwr Cymru)
99 ppm
99 ppm Slightly Hard
CF5 Welsh Water (Dwr Cymru)
74 ppm
74 ppm Slightly Hard
CF3 Welsh Water (Dwr Cymru)
72 ppm
72 ppm Slightly Hard
CF2 Welsh Water (Dwr Cymru)
71 ppm
71 ppm Slightly Hard
CF24 Welsh Water (Dwr Cymru)
71 ppm
71 ppm Slightly Hard
CF23 Welsh Water (Dwr Cymru)
70 ppm
70 ppm Slightly Hard
CF83 Welsh Water (Dwr Cymru)
66 ppm
66 ppm Slightly Hard
CF82 Welsh Water (Dwr Cymru)
65 ppm
65 ppm Slightly Hard
CF81 Welsh Water (Dwr Cymru)
64 ppm
64 ppm Slightly Hard
CF48 Welsh Water (Dwr Cymru)
40 ppm
40 ppm Soft
CF15 Welsh Water (Dwr Cymru)
39 ppm
39 ppm Soft
CF47 Welsh Water (Dwr Cymru)
39 ppm
39 ppm Soft
CF14 Welsh Water (Dwr Cymru)
38 ppm
38 ppm Soft
CF46 Welsh Water (Dwr Cymru)
38 ppm
38 ppm Soft
CF45 Welsh Water (Dwr Cymru)
37 ppm
37 ppm Soft
CF44 Welsh Water (Dwr Cymru)
36 ppm
36 ppm Soft
CF11 Welsh Water (Dwr Cymru)
35 ppm
35 ppm Soft
CF43 Welsh Water (Dwr Cymru)
35 ppm
35 ppm Soft
CF10 Welsh Water (Dwr Cymru)
34 ppm
34 ppm Soft
CF42 Welsh Water (Dwr Cymru)
34 ppm
34 ppm Soft
CF41 Welsh Water (Dwr Cymru)
33 ppm
33 ppm Soft
CF40 Welsh Water (Dwr Cymru)
32 ppm
32 ppm Soft
CF72 Welsh Water (Dwr Cymru)
32 ppm
32 ppm Soft
CF71 Welsh Water (Dwr Cymru)
31 ppm
31 ppm Soft

Water Companies Serving Cardiff

Welsh Water (Dwr Cymru)

Average hardness: 68 ppm (Slightly Hard) • 214 postcodes served

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