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We know that choosing a Water Softener isn't always easy. Whether you're looking for soft water for your home or business; our expert team are here to help you find the right option for you.
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UK Water Hardness Areas
Chalky deposits at the bottom of your kettle or floating film in your hot drinks? Reduced water flow or boiler efficiency in your property? Stubborn orange stains in your bathroom? Water marks on your shower screens and faucets?
If any of these sound familiar, you could be living in an area with hard water and experiencing the effects of limescale build-up. Use our water hardness map to find out how hard the water is in your area. At a level of 100ppm or more, you could benefit from a water softener and say goodbye to Limescale for good.
Hard water contains a large number of dissolved minerals, predominantly magnesium and calcium. Although water is naturally soft when it falls from the sky, it gains it’s hardness after making contact with the ground.
The South East of England and London have particularly high water hardness levels, however Scotland, Ireland and Wales typically benefit from soft water - however, as more houses are built and water is sourced from alternative reservoirs and aquifers, the traditional water quality of an area will change.
Try our free water hardness checker today to find out what the water hardness is like in your area!
UK Water Hardness Map
Use our water hardness checker today to discover how hard water is impacting your household, where you live and how you can rid yourself of the problem of limescale for good.
PPM Hardness Scale
| Water Hardness | PPM Range |
| Soft | Up to 100 |
| Slightly Hard | 100 - 150 |
| Moderately Hard | 150 - 200 |
| Hard | 200 - 300 |
| Very Hard | More than 300 |
Why not test the hardness of the water in your home?
Buy a water hardness testing kit to see how hard your water is and what benefits a Harvey Water Softener can bring to you and your family.
Know your Hardness in Clark Degrees or GPG US?
Water Hardness can be measured and is normally expressed in parts per million (ppm) or milligrams per litre (mg/l). This mean that water with 100 parts per million (ppm) of hardness will have 100 lumps of rock for every 1 million drops of water.
Hardness can also be measured in °Clark (Clark Degrees) or Grains per US Gallon (GPG).
- To convert from GPG to PPM: Multiply the GPG number by 17.1
- To convert from PPM to GPG: Divide the PPM number by 17.1
- To convert from °Clark to PPM: Multiply the °Clark number by 14.3
- To convert from PPM to °Clark: Divide the PPM number by 14.3
| PPM / Mg/L | °Clark | GPG US |
| 17.1 | 1.2 | 1 |
| 51.3 | 3.6 | 3 |
| 85.5 | 4.1 | 5 |
| 119.7 | 8.4 | 7 |
| 153.9 | 10.8 | 9 |
| 188.1 | 13.2 | 11 |
| 223.2 | 15.6 | 13 |
| 256.5 | 17.9 | 15 |
| 290.7 | 20.3 | 17 |
| 324.9 | 22.7 | 19 |
📧 Have a question? Please contact us via email and we'll be happy to assist.
Find your perfect Water Softener
We know that choosing a Water Softener isn't always easy. Whether you're looking for soft water for your home or business; our expert team are here to help you find the right option for you.
