Moderately Hard at 122 ppm · 11 postcode districts
Be notified when water companies in Preston report changes to hardness levels.
The average water hardness in Preston is 122 ppm, classified as moderately hard. Preston is served by United Utilities, covering 11 postcode districts across Lancashire in the North West region.
Hardness varies across the area — see the table below for a breakdown by postcode district. PR9 has the hardest water at 131 ppm, while PR25 is the softest at 101 ppm.
Sorted by hardness — tap a postcode for full details.
Tap for full coverage area and hardness data.
Each water company publishes its own hardness data, so you can cross-check the Preston figures here against the published hardness data from United Utilities Water Ltd.
Learn more about water hardness and how to manage it.
At 122 ppm, your water is moderately hard. A home testing kit lets you verify the exact hardness and check for other contaminants.
Home water test strips that check hardness, pH, chlorine, lead, and 12 other parameters. Results in around 60 seconds. 125 strips per pack.
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