West Midlands · West Midlands

Is Coventry water hard or soft?

Hard at 226 ppm · 24 postcode districts

  • Supplier Severn Trent Water
  • County West Midlands
  • Postcodes 24
Area average
226
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in Coventry is 226 ppm, classified as hard. Coventry is served by Severn Trent Water, covering 24 postcode districts across West Midlands in the West Midlands region.

Hardness varies across the area — see the table below for a breakdown by postcode district. CV13 has the hardest water at 274 ppm, while CV21 is the softest at 154 ppm.

By postcode

Water Hardness by Postcode in Coventry

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
CV13 Severn Trent Water
274
274 ppm Hard
CV12 Severn Trent Water
273
273 ppm Hard
CV11 Severn Trent Water
272
272 ppm Hard
CV10 Severn Trent Water
271
271 ppm Hard
CV9 Severn Trent Water
261
261 ppm Hard
CV8 Severn Trent Water
260
260 ppm Hard
CV7 Severn Trent Water
259
259 ppm Hard
CV6 Severn Trent Water
258
258 ppm Hard
CV5 Severn Trent Water
257
257 ppm Hard
CV4 Severn Trent Water
256
256 ppm Hard
CV3 Severn Trent Water
255
255 ppm Hard
CV2 Severn Trent Water
254
254 ppm Hard
CV1 Severn Trent Water
253
253 ppm Hard
CV47 Severn Trent Water
226
226 ppm Hard
CV37 Severn Trent Water
193
193 ppm Hard
CV36 Severn Trent Water
192
192 ppm Hard
CV35 Severn Trent Water
191
191 ppm Hard
CV34 Severn Trent Water
190
190 ppm Hard
CV33 Severn Trent Water
189
189 ppm Hard
CV32 Severn Trent Water
188
188 ppm Hard
CV31 Severn Trent Water
187
187 ppm Hard
CV23 Severn Trent Water
156
156 ppm Moderately Hard
CV22 Severn Trent Water
155
155 ppm Moderately Hard
CV21 Severn Trent Water
154
154 ppm Moderately Hard
Suppliers

Water Companies Serving Coventry

Tap for full coverage area and hardness data.

Severn Trent Water

222 ppm Hard

Each water company publishes its own hardness data, so you can cross-check the Coventry figures here against the published hardness data from Severn Trent Water.

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 Coventry

Popular choices for households dealing with hard water.

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

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

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 Coventry water

Is Coventry water hard or soft?
Coventry is classified as hard, averaging 226 ppm across 24 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in Coventry has the hardest water?
CV13 has the hardest water in Coventry at 274 ppm, while CV21 is the softest at 154 ppm. See the full table above for every district.
Which water company supplies Coventry?
Coventry is supplied by Severn Trent Water, covering 24 postcode districts across West Midlands.
Is tap water in Coventry safe to drink?
Yes. All tap water in Coventry meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Do I need a water softener in Coventry?
At 226 ppm, many households in Coventry 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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