WaterWater Hardness in Twickenham
Greater London, London • 19 postcode districts
Hard
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
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