Surrey & South London · Water company

SES Water Hardness

Average 239 ppm across 7 postcodes served.

  • Range 236–242 ppm
  • Region Surrey & South London
  • Postcodes 7
Company average
239
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+
239
Avg ppm
236
Min ppm
242
Max ppm
7
Postcodes

About SES Water

SES Water (Sutton and East Surrey Water) supplies drinking water to 735,000 people in parts of Surrey, Kent and south London. Chalk boreholes produce hard water.

Distribution

Hardness Breakdown

0
Soft
(0%)
0
Slightly Hard
(0%)
0
Moderate
(0%)
7
Hard
(100%)
0
Very Hard
(0%)
All areas

Areas Served by SES Water

Every postcode district, sorted by hardness.

Postcode Town Hardness PPM Level
SM7 Banstead
242
242 ppm Hard
SM6 Wallington
241
241 ppm Hard
SM5 Carshalton
240
240 ppm Hard
SM4 Morden
239
239 ppm Hard
SM3 Sutton
238
238 ppm Hard
SM2 Sutton
237
237 ppm Hard
SM1 Sutton
236
236 ppm Hard
Recommended

Products for SES Water Customers

Popular choices for households on hard water.

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty.

View on Amazon

Philips AWP1775 Shower Filter

From ~£30

A quick, affordable upgrade. Reduces chlorine and limescale at the showerhead — fits any standard UK shower hose in minutes. Protects skin and hair from hard water damage.

View on Amazon

Free Hard Water Action Plan

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