WaterWater Hardness in Plymouth
Devon, South West • 35 postcode districts
Slightly Hard
The average water hardness in Plymouth is 91 ppm, classified as slightly hard. Plymouth is served by South West Water, covering 35 postcode districts across Devon in the South West region.
Hardness varies across the area — see the table below for a breakdown by postcode district.
Water Hardness by Postcode in Plymouth
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| PL9 | South West Water | 138 ppm | Moderately Hard | |
| PL8 | South West Water | 137 ppm | Moderately Hard | |
| PL7 | South West Water | 136 ppm | Moderately Hard | |
| PL6 | South West Water | 135 ppm | Moderately Hard | |
| PL5 | South West Water | 134 ppm | Moderately Hard | |
| PL4 | South West Water | 133 ppm | Moderately Hard | |
| PL3 | South West Water | 132 ppm | Moderately Hard | |
| PL2 | South West Water | 131 ppm | Moderately Hard | |
| PL1 | South West Water | 130 ppm | Moderately Hard | |
| PL35 | South West Water | 115 ppm | Slightly Hard | |
| PL34 | South West Water | 114 ppm | Slightly Hard | |
| PL33 | South West Water | 113 ppm | Slightly Hard | |
| PL32 | South West Water | 112 ppm | Slightly Hard | |
| PL31 | South West Water | 111 ppm | Slightly Hard | |
| PL30 | South West Water | 110 ppm | Slightly Hard | |
| PL29 | South West Water | 86 ppm | Slightly Hard | |
| PL28 | South West Water | 85 ppm | Slightly Hard | |
| PL27 | South West Water | 84 ppm | Slightly Hard | |
| PL26 | South West Water | 83 ppm | Slightly Hard | |
| PL25 | South West Water | 82 ppm | Slightly Hard | |
| PL24 | South West Water | 81 ppm | Slightly Hard | |
| PL23 | South West Water | 80 ppm | Slightly Hard | |
| PL22 | South West Water | 79 ppm | Slightly Hard | |
| PL21 | South West Water | 78 ppm | Slightly Hard | |
| PL20 | South West Water | 77 ppm | Slightly Hard | |
| PL19 | South West Water | 53 ppm | Soft | |
| PL18 | South West Water | 52 ppm | Soft | |
| PL17 | South West Water | 51 ppm | Soft | |
| PL16 | South West Water | 50 ppm | Soft | |
| PL15 | South West Water | 49 ppm | Soft | |
| PL14 | South West Water | 48 ppm | Soft | |
| PL13 | South West Water | 47 ppm | Soft | |
| PL12 | South West Water | 46 ppm | Soft | |
| PL11 | South West Water | 45 ppm | Soft | |
| PL10 | South West Water | 44 ppm | Soft |
Water Companies Serving Plymouth
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