Cambridgeshire · East Of England

Is Peterborough water hard or soft?

Very Hard at 319 ppm · 35 postcode districts

  • Supplier Anglian Water
  • County Cambridgeshire
  • Postcodes 35
Area average
319
ppm CaCO₃
Very Hard
Soft
Moderate
Hard
Very hard
0100200300400+

Peterborough water hardness at a glance

  1. Peterborough water is very hard, averaging 319 ppm across 35 postcode districts.
  2. That is 112 ppm above the UK average of 207 ppm.
  3. The hardest district is PE9 at 367 ppm; the softest is PE10 at 267 ppm.
  4. The supplier is Anglian Water.
  5. Expect limescale on kettles, taps and showerheads; see the water softener guide for sizing and costs.

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The average water hardness in Peterborough is 319 ppm, classified as very hard. Peterborough is served by Anglian Water, covering 35 postcode districts across Cambridgeshire in the East Of England region.

Hardness varies across the area. See the table below for a breakdown by postcode district. PE9 has the hardest water at 367 ppm, while PE10 is the softest at 267 ppm.

By postcode

Water Hardness by Postcode in Peterborough

Sorted by hardness. Tap a postcode for full details.

Postcode Water Company Hardness PPM Level
PE9 Anglian Water
367
367 ppm Very Hard
PE8 Anglian Water
366
366 ppm Very Hard
PE7 Anglian Water
365
365 ppm Very Hard
PE6 Anglian Water
364
364 ppm Very Hard
PE5 Anglian Water
363
363 ppm Very Hard
PE4 Anglian Water
362
362 ppm Very Hard
PE3 Anglian Water
361
361 ppm Very Hard
PE2 Anglian Water
360
360 ppm Very Hard
PE1 Anglian Water
359
359 ppm Very Hard
PE38 Anglian Water
341
341 ppm Very Hard
PE37 Anglian Water
340
340 ppm Very Hard
PE36 Anglian Water
339
339 ppm Very Hard
PE34 Anglian Water
337
337 ppm Very Hard
PE33 Anglian Water
336
336 ppm Very Hard
PE32 Anglian Water
335
335 ppm Very Hard
PE31 Anglian Water
334
334 ppm Very Hard
PE30 Anglian Water
333
333 ppm Very Hard
PE29 Anglian Water
309
309 ppm Very Hard
PE28 Anglian Water
308
308 ppm Very Hard
PE27 Anglian Water
307
307 ppm Very Hard
PE26 Anglian Water
306
306 ppm Very Hard
PE25 Anglian Water
305
305 ppm Very Hard
PE24 Anglian Water
304
304 ppm Very Hard
PE23 Anglian Water
303
303 ppm Very Hard
PE22 Anglian Water
302
302 ppm Very Hard
PE21 Anglian Water
301
301 ppm Very Hard
PE20 Anglian Water
300
300 ppm Hard
PE19 Anglian Water
276
276 ppm Hard
PE16 Anglian Water
273
273 ppm Hard
PE15 Anglian Water
272
272 ppm Hard
PE14 Anglian Water
271
271 ppm Hard
PE13 Anglian Water
270
270 ppm Hard
PE12 Anglian Water
269
269 ppm Hard
PE11 Anglian Water
268
268 ppm Hard
PE10 Anglian Water
267
267 ppm Hard
Suppliers

Water Companies Serving Peterborough

Tap for full coverage area and hardness data.

Anglian Water

321 ppm Very Hard

Each water company publishes its own hardness data, so you can cross-check the Peterborough figures here against the published hardness data from Anglian Water Services Ltd.

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 Peterborough

Popular choices for households dealing with very 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 Peterborough water

Is Peterborough water hard or soft?
Peterborough is classified as very hard, averaging 319 ppm across 35 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in Peterborough has the hardest water?
PE9 has the hardest water in Peterborough at 367 ppm, while PE10 is the softest at 267 ppm. See the full table above for every district.
Which water company supplies Peterborough?
Peterborough is supplied by Anglian Water, covering 35 postcode districts across Cambridgeshire.
Is tap water in Peterborough safe to drink?
Hardness is not a safety issue: the World Health Organization sets no health-based limit for water hardness, so hard and soft water are both fine to drink. Drinking water quality is regulated by the Drinking Water Inspectorate in England and Wales and the Drinking Water Quality Regulator in Scotland, and your water company publishes test results for your area.
Do I need a water softener in Peterborough?
At 319 ppm, many households in Peterborough 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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