WaterWater Hardness in Cornwall
South West • 23 postcode districts • 1 towns
Slightly Hard
91
Average ppm
69
Minimum ppm
109
Maximum ppm
23
Postcodes
Water Hardness Across Cornwall
The average water hardness in Cornwall is 91 ppm, classified as slightly hard. Across 23 postcode districts in the South West region, hardness ranges from 69 ppm to 109 ppm.
Cornwall is served by South West Water. With slightly hard water, limescale is unlikely to be a major concern in most homes.
Towns in Cornwall
| Town | Avg Hardness | PPM | Level |
|---|---|---|---|
| Truro | 91 ppm | Slightly Hard |
Water Companies in Cornwall
All Postcodes in Cornwall
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| TR27 | Hayle | 109 ppm | Slightly Hard | |
| TR26 | St Ives | 108 ppm | Slightly Hard | |
| TR9 | St Columb | 107 ppm | Slightly Hard | |
| TR8 | Newquay | 106 ppm | Slightly Hard | |
| TR7 | Newquay | 105 ppm | Slightly Hard | |
| TR6 | Perranporth | 104 ppm | Slightly Hard | |
| TR21 | Isles Of Scilly | 103 ppm | Slightly Hard | |
| TR5 | St Agnes | 103 ppm | Slightly Hard | |
| TR20 | Penzance | 102 ppm | Slightly Hard | |
| TR4 | Truro | 102 ppm | Slightly Hard | |
| TR3 | Truro | 101 ppm | Slightly Hard | |
| TR2 | Truro | 100 ppm | Slightly Hard | |
| TR1 | Truro | 99 ppm | Slightly Hard | |
| TR19 | Penzance | 78 ppm | Slightly Hard | |
| TR18 | Penzance | 77 ppm | Slightly Hard | |
| TR17 | Marazion | 76 ppm | Slightly Hard | |
| TR16 | Redruth | 75 ppm | Slightly Hard | |
| TR15 | Redruth | 74 ppm | Slightly Hard | |
| TR14 | Camborne | 73 ppm | Slightly Hard | |
| TR13 | Helston | 72 ppm | Slightly Hard | |
| TR12 | Helston | 71 ppm | Slightly Hard | |
| TR11 | Falmouth | 70 ppm | Slightly Hard | |
| TR10 | Penryn | 69 ppm | Slightly Hard |
Hard Water Guides
Learn more about water hardness and how to manage it.
All counties in South West • Hardest water areas • Softest water areas • Hard water solutions
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