WaterWater Hardness in Watford
Greater London, London • 11 postcode districts
Hard
The average water hardness in Watford is 233 ppm, classified as hard. Watford is served by Affinity Water, covering 11 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 Watford
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| WD25 | Affinity Water | 255 ppm | Hard | |
| WD24 | Affinity Water | 254 ppm | Hard | |
| WD23 | Affinity Water | 253 ppm | Hard | |
| WD7 | Affinity Water | 228 ppm | Hard | |
| WD6 | Affinity Water | 227 ppm | Hard | |
| WD19 | Affinity Water | 226 ppm | Hard | |
| WD5 | Affinity Water | 226 ppm | Hard | |
| WD18 | Affinity Water | 225 ppm | Hard | |
| WD4 | Affinity Water | 225 ppm | Hard | |
| WD17 | Affinity Water | 224 ppm | Hard | |
| WD3 | Affinity Water | 224 ppm | Hard |
Water Companies Serving Watford
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