WaterIs Twickenham Water Hard or Soft?
Hard at 284 ppm • Greater London, London
The average water hardness in Twickenham is 284 ppm, classified as hard. Twickenham is served by Thames Water, covering 19 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 Twickenham
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| TW20 | Thames Water | 307 ppm | Very Hard | |
| TW9 | Thames Water | 293 ppm | Hard | |
| TW8 | Thames Water | 292 ppm | Hard | |
| TW7 | Thames Water | 291 ppm | Hard | |
| TW5 | Thames Water | 289 ppm | Hard | |
| TW4 | Thames Water | 288 ppm | Hard | |
| TW3 | Thames Water | 287 ppm | Hard | |
| TW2 | Thames Water | 286 ppm | Hard | |
| TW1 | Thames Water | 285 ppm | Hard | |
| TW19 | Thames Water | 283 ppm | Hard | |
| TW18 | Thames Water | 282 ppm | Hard | |
| TW17 | Thames Water | 281 ppm | Hard | |
| TW16 | Thames Water | 280 ppm | Hard | |
| TW15 | Thames Water | 279 ppm | Hard | |
| TW14 | Thames Water | 278 ppm | Hard | |
| TW13 | Thames Water | 277 ppm | Hard | |
| TW12 | Thames Water | 276 ppm | Hard | |
| TW11 | Thames Water | 275 ppm | Hard | |
| TW10 | Thames Water | 274 ppm | Hard |
Water Companies Serving Twickenham
Water Hardness Guides
Recommended Products for Twickenham
Popular choices for households dealing with 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.