WaterHard.uk

Water Hardness in HA2 Harrow

Supplied by Thames Water • Greater London, London

329 PPM 0 200 400
Very Hard
329
ppm (mg/L CaCO₃)
23°
Clark Degrees
18.4°
German Degrees (dH)
32.9°
French Degrees (fH)

Water Hardness in Harrow (HA2)

The water in postcode district HA2 is classified as very hard with a hardness level of 329 ppm (parts per million) calcium carbonate. This is 122 ppm above the UK national average of 207 ppm.

Your water is supplied by Thames Water, which serves the London region. Thames Water draws water from sources that naturally contain dissolved minerals, primarily calcium and magnesium compounds.

What Does Very Hard Water Mean for Your Home?

  • ! Heavy limescale requiring frequent descaling
  • ! Blocked showerheads and reduced water flow
  • ! Substantially higher energy bills from boiler scale
  • ! Dry, itchy skin and lifeless hair
  • ! White crusty deposits on taps and surfaces
  • ! Reduced lifespan of washing machines and dishwashers

Solutions for Hard Water in Harrow

At 329 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty, suits 1–4 people.

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Philips AWP1775 Shower Filter

From ~£30

Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead — no plumbing needed. KDF filtration, cartridge lasts ~6 months. A great first step in a hard water area.

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BRITA Marella Water Filter Jug

From ~£20

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

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How HA2 Compares

Area Hardness PPM
HA2 Harrow
329 ppm
329 ppm
UK National Average
207 ppm
207 ppm

Nearby Areas

HA1
Harrow
328 ppm
HA3
Harrow
330 ppm
HA4
Ruislip
331 ppm

Frequently Asked Questions

What is the water hardness in HA2 Harrow?
The water in HA2 Harrow has a hardness level of 329 ppm (parts per million) calcium carbonate, classified as very hard. This is 122 ppm above the UK national average of 207 ppm.
Which water company supplies HA2?
HA2 Harrow is supplied by Thames Water. Thames Water serves the London region.
Is the water in HA2 safe to drink?
Yes. Very Hard water at 329 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 HA2?
For very hard water at 329 ppm, a whole-house water softener is the most effective solution. You can also use a jug filter for drinking water, descaling products for appliances, and a shower filter for better skin and hair.
What does 329 ppm water hardness mean?
329 ppm means there are 329 parts per million of calcium carbonate dissolved in the water. This is equivalent to 23 Clark degrees, 18.4 German degrees, or 32.9 French degrees. Water above 180 ppm is generally considered hard.

Learn More

All postcodes in Harrow Thames Water coverage Hard water effects on your home Solutions for hard water

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