WaterWater Hardness in County Durham
North East • 26 postcode districts • 2 towns
Slightly Hard
107
Average ppm
50
Minimum ppm
150
Maximum ppm
26
Postcodes
Water Hardness Across County Durham
The average water hardness in County Durham is 107 ppm, classified as slightly hard. Across 26 postcode districts in the North East region, hardness ranges from 50 ppm to 150 ppm.
County Durham is served by Northumbrian Water. With slightly hard water, limescale is unlikely to be a major concern in most homes.
Towns in County Durham
| Town | Avg Hardness | PPM | Level |
|---|---|---|---|
| Durham | 126 ppm | Moderately Hard | |
| Darlington | 97 ppm | Slightly Hard |
Water Companies in County Durham
All Postcodes in County Durham
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| DH7 | Durham | 150 ppm | Moderately Hard | |
| DH6 | Durham | 149 ppm | Moderately Hard | |
| DH5 | Houghton Le Spring | 148 ppm | Moderately Hard | |
| DH4 | Houghton Le Spring | 147 ppm | Moderately Hard | |
| DH3 | Chester Le Street | 146 ppm | Moderately Hard | |
| DH2 | Chester Le Street | 145 ppm | Moderately Hard | |
| DH1 | Durham | 144 ppm | Moderately Hard | |
| DL17 | Ferryhill | 122 ppm | Moderately Hard | |
| DL16 | Spennymoor | 121 ppm | Moderately Hard | |
| DL15 | Crook | 120 ppm | Slightly Hard | |
| DL14 | Bishop Auckland | 119 ppm | Slightly Hard | |
| DL13 | Bishop Auckland | 118 ppm | Slightly Hard | |
| DL12 | Barnard Castle | 117 ppm | Slightly Hard | |
| DL11 | Richmond | 116 ppm | Slightly Hard | |
| DL10 | Richmond | 115 ppm | Slightly Hard | |
| DL9 | Catterick Garrison | 82 ppm | Slightly Hard | |
| DL8 | Bedale | 81 ppm | Slightly Hard | |
| DL7 | Northallerton | 80 ppm | Slightly Hard | |
| DL6 | Northallerton | 79 ppm | Slightly Hard | |
| DL5 | Newton Aycliffe | 78 ppm | Slightly Hard | |
| DL4 | Shildon | 77 ppm | Slightly Hard | |
| DL3 | Darlington | 76 ppm | Slightly Hard | |
| DL2 | Darlington | 75 ppm | Slightly Hard | |
| DL1 | Darlington | 74 ppm | Slightly Hard | |
| DH9 | Stanley | 51 ppm | Soft | |
| DH8 | Consett | 50 ppm | Soft |
Hard Water Guides
Learn more about water hardness and how to manage it.
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