WaterWater Hardness in Truro
Cornwall, South West • 23 postcode districts
Slightly Hard
The average water hardness in Truro is 91 ppm, classified as slightly hard. Truro is served by South West Water, covering 23 postcode districts across Cornwall 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 Truro
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| TR27 | South West Water | 109 ppm | Slightly Hard | |
| TR26 | South West Water | 108 ppm | Slightly Hard | |
| TR9 | South West Water | 107 ppm | Slightly Hard | |
| TR8 | South West Water | 106 ppm | Slightly Hard | |
| TR7 | South West Water | 105 ppm | Slightly Hard | |
| TR6 | South West Water | 104 ppm | Slightly Hard | |
| TR21 | South West Water | 103 ppm | Slightly Hard | |
| TR5 | South West Water | 103 ppm | Slightly Hard | |
| TR20 | South West Water | 102 ppm | Slightly Hard | |
| TR4 | South West Water | 102 ppm | Slightly Hard | |
| TR3 | South West Water | 101 ppm | Slightly Hard | |
| TR2 | South West Water | 100 ppm | Slightly Hard | |
| TR1 | South West Water | 99 ppm | Slightly Hard | |
| TR19 | South West Water | 78 ppm | Slightly Hard | |
| TR18 | South West Water | 77 ppm | Slightly Hard | |
| TR17 | South West Water | 76 ppm | Slightly Hard | |
| TR16 | South West Water | 75 ppm | Slightly Hard | |
| TR15 | South West Water | 74 ppm | Slightly Hard | |
| TR14 | South West Water | 73 ppm | Slightly Hard | |
| TR13 | South West Water | 72 ppm | Slightly Hard | |
| TR12 | South West Water | 71 ppm | Slightly Hard | |
| TR11 | South West Water | 70 ppm | Slightly Hard | |
| TR10 | South West Water | 69 ppm | Slightly Hard |
Water Companies Serving Truro
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