UK region

Water hardness in Yorkshire

Average 215 ppm across 217 postcode districts, classified as hard.

  • Range 150 to 300 ppm
  • Counties 4
  • Suppliers Yorkshire Water
Regional average
215
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+
215
Avg ppm
150
Min ppm
300
Max ppm
217
Postcodes

Yorkshire water hardness at a glance

  1. Yorkshire water is hard, averaging 215 ppm across 217 postcode districts.
  2. That is 8 ppm above the UK average of 207 ppm.
  3. Districts range from 150 ppm to 300 ppm; the hardest county is East Yorkshire (237 ppm) and the softest is South Yorkshire (211 ppm).
  4. Suppliers: Yorkshire Water.
  5. Expect limescale on kettles, taps and showerheads; see the water softener guide.

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Water Hardness Across Yorkshire

The average water hardness in the Yorkshire region is 215 ppm, classified as hard. Across 217 postcode districts, hardness ranges from 150 ppm to 300 ppm.

Is the water in Yorkshire hard or soft? It is hard, with readings from 150 to 300 ppm. Yorkshire Water supplies most postcodes in Yorkshire; cross-check against Yorkshire Water's own water hardness data.

The region is served by Yorkshire Water. Water hardness varies by county; see the breakdown below or check your specific postcode.

Hardness varies notably within Yorkshire: East Yorkshire has the hardest water in the region at 237 ppm, while South Yorkshire is the softest at 211 ppm. The region spans 10 towns and 217 postcode districts in total.

At 215 ppm, Yorkshire ranks as hard water nationally. Compare it against the 50 hardest water areas in the UK.

Worth reading: our water softener guide covers the best options for Yorkshire residents, and our limescale removal guide has quick fixes for kettles and taps.

By county

Counties in Yorkshire

Sorted by hardness: see how your county compares.

County Hardness PPM Level Postcodes
East Yorkshire
237
237 ppm Hard 20
North Yorkshire
215
215 ppm Hard 34
West Yorkshire
214
214 ppm Hard 86
South Yorkshire
211
211 ppm Hard 77
Suppliers

Water Companies in Yorkshire

Tap on a company for full coverage area and hardness data.

Yorkshire Water

215 ppm Hard

Hard Water Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Hard Water Effects Solutions
Recommended

Products for Yorkshire

Top picks for households in hard water areas.

Splendid Twin Tank Water Softener

Twin-tank electric softener sized for 1 to 7 bedroom homes. Removes limescale from pipes, boilers, and appliances and delivers continuous soft water, with metered regeneration to keep salt use low.

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Philips Shower Filter

Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead, no plumbing needed. A good first step before committing to a full softener.

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FAQ

Common questions about Yorkshire water

Is Yorkshire's water hard or soft?
Yorkshire is classified as hard water, averaging 215 ppm across 217 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Is tap water in Yorkshire safe to drink?
Hardness is not a safety issue: the World Health Organization sets no health-based limit for water hardness, so hard and soft water are both fine to drink. Drinking water quality is regulated by the Drinking Water Inspectorate in England and Wales and the Drinking Water Quality Regulator in Scotland, and your water company publishes test results for your area.
Why is water in Yorkshire hard?
Water hardness in Yorkshire depends on the geology: chalk and limestone aquifers dissolve calcium and magnesium into the supply, making it harder. Areas with sandstone or granite tend to be softer.
Does hard water affect boilers in Yorkshire?
Over time, limescale acts as an insulator in heat exchangers, reducing efficiency by a few percentage points each year if untreated. A water softener can help protect your boiler.
What's the average water hardness in Yorkshire?
The average water hardness across Yorkshire is 215 ppm (parts per million), classified as hard. It ranges from 150 ppm to 300 ppm across 217 postcode districts.
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