Hertfordshire · South East

Is St Albans water hard or soft?

Hard at 244 ppm · 10 postcode districts

  • Supplier Affinity Water
  • County Hertfordshire
  • Postcodes 10
Area average
244
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in St Albans is 244 ppm, classified as hard. St Albans is served by Affinity Water, covering 10 postcode districts across Hertfordshire in the South East region.

Hardness varies across the area — see the table below for a breakdown by postcode district. AL10 has the hardest water at 254 ppm, while AL1 is the softest at 239 ppm.

By postcode

Water Hardness by Postcode in St Albans

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
AL10 Affinity Water
254
254 ppm Hard
AL9 Affinity Water
247
247 ppm Hard
AL8 Affinity Water
246
246 ppm Hard
AL7 Affinity Water
245
245 ppm Hard
AL6 Affinity Water
244
244 ppm Hard
AL5 Affinity Water
243
243 ppm Hard
AL4 Affinity Water
242
242 ppm Hard
AL3 Affinity Water
241
241 ppm Hard
AL2 Affinity Water
240
240 ppm Hard
AL1 Affinity Water
239
239 ppm Hard
Suppliers

Water Companies Serving St Albans

Tap for full coverage area and hardness data.

Affinity Water

268 ppm Hard

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal
Recommended

Products for St Albans

Popular choices for households dealing with hard water.

Splendid Twin Tank Water Softener

From ~£400

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

From ~£30

Quick win for skin and hair in hard water areas. Reduces chlorine and limescale, fits standard shower hoses in minutes, no tools needed. Cartridge lasts around 6 months.

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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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FAQ

Common questions about St Albans water

Is St Albans water hard or soft?
St Albans is classified as hard, averaging 244 ppm across 10 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in St Albans has the hardest water?
AL10 has the hardest water in St Albans at 254 ppm, while AL1 is the softest at 239 ppm. See the full table above for every district.
Which water company supplies St Albans?
St Albans is supplied by Affinity Water, covering 10 postcode districts across Hertfordshire.
Is tap water in St Albans safe to drink?
Yes. All tap water in St Albans meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Do I need a water softener in St Albans?
At 244 ppm, many households in St Albans notice limescale in kettles and showerheads within weeks. A shower filter is the cheapest first step; a whole-house softener gives the most complete protection.
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