Water Hardness in Croydon

Greater London, London • 9 postcode districts

Hard

The average water hardness in Croydon is 297 ppm, classified as hard. Croydon is served by South East Water, covering 9 postcode districts across Greater London in the London region.

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

Water Hardness by Postcode in Croydon

Postcode	Water Company	Hardness	PPM	Level
CR9	South East Water	301 ppm	301 ppm	Very Hard
CR8	South East Water	300 ppm	300 ppm	Hard
CR7	South East Water	299 ppm	299 ppm	Hard
CR6	South East Water	298 ppm	298 ppm	Hard
CR5	South East Water	297 ppm	297 ppm	Hard
CR4	South East Water	296 ppm	296 ppm	Hard
CR3	South East Water	295 ppm	295 ppm	Hard
CR2	South East Water	294 ppm	294 ppm	Hard
CR0	South East Water	292 ppm	292 ppm	Hard

Water Companies Serving Croydon

South East Water

Average hardness: 297 ppm (Hard) • 17 postcodes served

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