Water hardness

PL18 Gunnislake

Near or below the UK average. Limescale builds slowly.

At 52 ppm, Gunnislake ranks near the UK's softest water areas — compare it against the hardest areas.

Soft 52 ppm South West South West Water
Your reading
52
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 52 ppm in Gunnislake (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
£3–5
per year
Worth it?
No
at 52 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 Gunnislake?

A verdict and running-cost estimate based on PL18's 52 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 51.5 days
Salt running cost
£3–5
per year (~11 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 52 ppm: negligible: appliances reach full expected life. Sized for a 4-person home; regenerates roughly every 52 days (estimate). Figures are conservative estimates and vary with household size and usage.

Test Your Water in Gunnislake

At 52 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 PL18

Sourced from South West Water's published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)52
Degrees Clark (°Clark)3.6
Degrees French (°fH)5.2
Degrees German (°dH)2.9
Calcium (mg/L Ca²⁺)21

Supplier and area

Water supplier South West Water
Region South West
County Devon
Hardness band Soft
UK average 207 ppm
Visit South West Water page
Official source
South West Water water-hardness report

Most of the region is soft water, except East Devon; use the postcode lookup on this page to find your address's specific water quality.

Nearby

Other areas near Gunnislake

PL17
Callington
51ppm
Soft
PL19
Tavistock
53ppm
Soft
PL20
Yelverton
77ppm
Slightly Hard
FAQ

Common questions about PL18

What is the water hardness in PL18 Gunnislake?
The water in PL18 Gunnislake has a hardness level of 52 ppm (parts per million) calcium carbonate, classified as soft. This is 155 ppm below the UK national average of 207 ppm.
Which water company supplies PL18?
PL18 Gunnislake is supplied by South West Water. South West Water serves the South West region.
Is the water in PL18 safe to drink?
Yes. Soft water at 52 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 PL18?
At 52 ppm, the water in PL18 is soft and unlikely to cause significant issues. A jug filter can improve taste, but a water softener is generally not necessary.
What does 52 ppm water hardness mean?
52 ppm means there are 52 parts per million of calcium carbonate dissolved in the water. This is equivalent to 3.6 Clark degrees, 2.9 German degrees, or 5.2 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in PL18?
For a typical 4-person home at 52 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 51.5 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 PL18?
At 52 ppm, expect to use about 11 kg of salt a year, costing roughly £3–£5/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

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