WaterWater Hardness in Canterbury
Kent, South East • 21 postcode districts
Hard
The average water hardness in Canterbury is 255 ppm, classified as hard. Canterbury is served by Southern Water, covering 21 postcode districts across Kent 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 Canterbury
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| CT21 | Southern Water | 291 ppm | Hard | |
| CT20 | Southern Water | 290 ppm | Hard | |
| CT19 | Southern Water | 266 ppm | Hard | |
| CT18 | Southern Water | 265 ppm | Hard | |
| CT17 | Southern Water | 264 ppm | Hard | |
| CT16 | Southern Water | 263 ppm | Hard | |
| CT15 | Southern Water | 262 ppm | Hard | |
| CT14 | Southern Water | 261 ppm | Hard | |
| CT13 | Southern Water | 260 ppm | Hard | |
| CT12 | Southern Water | 259 ppm | Hard | |
| CT11 | Southern Water | 258 ppm | Hard | |
| CT10 | Southern Water | 257 ppm | Hard | |
| CT9 | Southern Water | 245 ppm | Hard | |
| CT8 | Southern Water | 244 ppm | Hard | |
| CT7 | Southern Water | 243 ppm | Hard | |
| CT6 | Southern Water | 242 ppm | Hard | |
| CT5 | Southern Water | 241 ppm | Hard | |
| CT4 | Southern Water | 240 ppm | Hard | |
| CT3 | Southern Water | 239 ppm | Hard | |
| CT2 | Southern Water | 238 ppm | Hard | |
| CT1 | Southern Water | 237 ppm | Hard |
Water Companies Serving Canterbury
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