WaterWater Hardness in Derby
Derbyshire, East Midlands • 23 postcode districts
Hard
The average water hardness in Derby is 199 ppm, classified as hard. Derby is served by Severn Trent Water, covering 23 postcode districts across Derbyshire in the East Midlands region.
Hardness varies across the area — see the table below for a breakdown by postcode district.
Water Hardness by Postcode in Derby
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| DE45 | Severn Trent Water | 283 ppm | Hard | |
| DE75 | Severn Trent Water | 231 ppm | Hard | |
| DE74 | Severn Trent Water | 230 ppm | Hard | |
| DE73 | Severn Trent Water | 229 ppm | Hard | |
| DE72 | Severn Trent Water | 228 ppm | Hard | |
| DE24 | Severn Trent Water | 216 ppm | Hard | |
| DE23 | Severn Trent Water | 215 ppm | Hard | |
| DE22 | Severn Trent Water | 214 ppm | Hard | |
| DE21 | Severn Trent Water | 213 ppm | Hard | |
| DE65 | Severn Trent Water | 198 ppm | Hard | |
| DE15 | Severn Trent Water | 184 ppm | Hard | |
| DE14 | Severn Trent Water | 183 ppm | Hard | |
| DE7 | Severn Trent Water | 183 ppm | Hard | |
| DE13 | Severn Trent Water | 182 ppm | Hard | |
| DE6 | Severn Trent Water | 182 ppm | Hard | |
| DE12 | Severn Trent Water | 181 ppm | Hard | |
| DE5 | Severn Trent Water | 181 ppm | Hard | |
| DE11 | Severn Trent Water | 180 ppm | Moderately Hard | |
| DE4 | Severn Trent Water | 180 ppm | Moderately Hard | |
| DE3 | Severn Trent Water | 179 ppm | Moderately Hard | |
| DE1 | Severn Trent Water | 177 ppm | Moderately Hard | |
| DE56 | Severn Trent Water | 166 ppm | Moderately Hard | |
| DE55 | Severn Trent Water | 165 ppm | Moderately Hard |
Water Companies Serving Derby
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