WaterIs Redhill Water Hard or Soft?
Very Hard at 321 ppm • Surrey, South East
The average water hardness in Redhill is 321 ppm, classified as very hard. Redhill is served by Southern Water, covering 20 postcode districts across Surrey in the South East region.
Hardness varies across the area — see the table below for a breakdown by postcode district.
Water Hardness by Postcode in Redhill
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| RH20 | Southern Water | 344 ppm | Very Hard | |
| RH9 | Southern Water | 329 ppm | Very Hard | |
| RH8 | Southern Water | 328 ppm | Very Hard | |
| RH7 | Southern Water | 327 ppm | Very Hard | |
| RH6 | Southern Water | 326 ppm | Very Hard | |
| RH5 | Southern Water | 325 ppm | Very Hard | |
| RH4 | Southern Water | 324 ppm | Very Hard | |
| RH3 | Southern Water | 323 ppm | Very Hard | |
| RH2 | Southern Water | 322 ppm | Very Hard | |
| RH1 | Southern Water | 321 ppm | Very Hard | |
| RH19 | Southern Water | 320 ppm | Very Hard | |
| RH18 | Southern Water | 319 ppm | Very Hard | |
| RH17 | Southern Water | 318 ppm | Very Hard | |
| RH16 | Southern Water | 317 ppm | Very Hard | |
| RH15 | Southern Water | 316 ppm | Very Hard | |
| RH14 | Southern Water | 315 ppm | Very Hard | |
| RH13 | Southern Water | 314 ppm | Very Hard | |
| RH12 | Southern Water | 313 ppm | Very Hard | |
| RH11 | Southern Water | 312 ppm | Very Hard | |
| RH10 | Southern Water | 311 ppm | Very Hard |
Water Companies Serving Redhill
Water Hardness Guides
Recommended Products for Redhill
Popular choices for households dealing with very hard water in this area.
Water2Buy W2B200 Water Softener
From ~£400Best-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 AmazonPhilips AWP1775 Shower Filter
From ~£30Quick win for skin and hair in hard water areas. Reduces chlorine and limescale — fits standard shower hoses in minutes, no tools needed. Cartridge lasts ~6 months.
View on AmazonBRITA Marella Water Filter Jug
From ~£20UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.
View on AmazonGet Water Hardness Updates
Be notified when your water company reports changes to hardness levels.