Water hardness

LL17 St Asaph

Near or below the UK average. Limescale builds slowly.

At 41 ppm, St Asaph ranks near the UK's softest water areas — compare it against the hardest areas.

Soft 41 ppm Wales Welsh Water (Dwr Cymru)
Your reading
41
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 41 ppm in St Asaph (soft water).

  • Soap lathers easily with less product needed
  • Minimal limescale buildup in appliances
  • Gentle on skin and hair
  • May taste slightly flat compared to harder water
Heat loss
1%
Minimal scaling
Softener salt
£2–4
per year
Worth it?
No
at 41 ppm
Suggested for soft water
Filter jug (optional)
Mainly a taste preference, limescale won't be a real issue here.
From £20
Maintenance habits
Routine descaling once or twice a year is plenty.
Free
Softening

Should you soften the water in St Asaph?

A verdict and running-cost estimate based on LL17's 41 ppm reading, for a typical 4-person household.

Softener optional

Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Recommended size
24k
grain capacity, regenerates ~every 65.3 days
Salt running cost
£2–4
per year (~8 kg salt)
Limescale
1%
est. heater efficiency loss. Minimal scaling
Soap saving
Minimal
Water is already soft, so there is little detergent saving from softening.

Appliance impact at 41 ppm: negligible: appliances reach full expected life. Sized for a 4-person home; regenerates roughly every 65 days (estimate). Figures are conservative estimates and vary with household size and usage.

Test Your Water in St Asaph

At 41 ppm, your water is soft. A home testing kit lets you verify the exact hardness and check for other contaminants.

TESPERT 16-in-1 Water Testing Kit

From ~£10

Home water test strips that check hardness, pH, chlorine, lead, and 12 other parameters. Results in around 60 seconds. 125 strips per pack.

View on Amazon
Water quality details

Hardness data for LL17

Sourced from Welsh Water (Dwr Cymru)'s published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)41
Degrees Clark (°Clark)2.9
Degrees French (°fH)4.1
Degrees German (°dH)2.3
Calcium (mg/L Ca²⁺)16

Supplier and area

Water supplier Welsh Water (Dwr Cymru)
Region Wales
County North Wales
Hardness band Soft
UK average 207 ppm
Visit Welsh Water (Dwr Cymru) page
Official source
Dwr Cymru Welsh Water water-hardness report

Read the hardness explanation here, then enter your postcode on the linked drinking water quality checker to see your area's calcium and magnesium levels.

Nearby

Other areas near St Asaph

LL16
Denbigh
40ppm
Soft
LL18
Rhyl
42ppm
Soft
LL19
Prestatyn
43ppm
Soft
FAQ

Common questions about LL17

What is the water hardness in LL17 St Asaph?
The water in LL17 St Asaph has a hardness level of 41 ppm (parts per million) calcium carbonate, classified as soft. This is 166 ppm below the UK national average of 207 ppm.
Which water company supplies LL17?
LL17 St Asaph is supplied by Welsh Water (Dwr Cymru). Welsh Water (Dwr Cymru) serves the Wales region.
Is the water in LL17 safe to drink?
Yes. Soft water at 41 ppm is safe to drink. Water hardness affects taste and can cause limescale, but it is not a health risk. In fact, hard water contains beneficial minerals like calcium and magnesium.
How can I reduce water hardness in LL17?
At 41 ppm, the water in LL17 is soft and unlikely to cause significant issues. A jug filter can improve taste, but a water softener is generally not necessary.
What does 41 ppm water hardness mean?
41 ppm means there are 41 parts per million of calcium carbonate dissolved in the water. This is equivalent to 2.9 Clark degrees, 2.3 German degrees, or 4.1 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in LL17?
For a typical 4-person home at 41 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 65.3 days. Larger households or higher daily use need a bigger unit. These figures are conservative estimates.
How much does it cost to run a water softener in LL17?
At 41 ppm, expect to use about 8 kg of salt a year, costing roughly £2–£4/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

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Check another postcode

Compare hardness across areas before moving or buying a softener.