Tyne And Wear · North East

Is Sunderland water hard or soft?

Moderately Hard at 135 ppm · 8 postcode districts

  • Supplier Northumbrian Water
  • County Tyne And Wear
  • Postcodes 8
Area average
135
ppm CaCO₃
Moderately Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in Sunderland is 135 ppm, classified as moderately hard. Sunderland is served by Northumbrian Water, covering 8 postcode districts across Tyne And Wear in the North East region.

Hardness varies across the area — see the table below for a breakdown by postcode district. SR7 has the hardest water at 150 ppm, while SR8 is the softest at 50 ppm.

By postcode

Water Hardness by Postcode in Sunderland

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
SR7 Northumbrian Water
150
150 ppm Moderately Hard
SR6 Northumbrian Water
149
149 ppm Moderately Hard
SR5 Northumbrian Water
148
148 ppm Moderately Hard
SR4 Northumbrian Water
147
147 ppm Moderately Hard
SR3 Northumbrian Water
146
146 ppm Moderately Hard
SR2 Northumbrian Water
145
145 ppm Moderately Hard
SR1 Northumbrian Water
144
144 ppm Moderately Hard
SR8 Northumbrian Water
50
50 ppm Soft
Suppliers

Water Companies Serving Sunderland

Tap for full coverage area and hardness data.

Northumbrian Water

101 ppm Slightly Hard

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal

Test Your Water in Sunderland

At 135 ppm, your water is moderately hard. 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.

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FAQ

Common questions about Sunderland water

Is Sunderland water hard or soft?
Sunderland is classified as moderately hard, averaging 135 ppm across 8 postcode districts. Limescale build-up is minimal at this level, though individual postcodes vary.
Which postcode in Sunderland has the hardest water?
SR7 has the hardest water in Sunderland at 150 ppm, while SR8 is the softest at 50 ppm. See the full table above for every district.
Which water company supplies Sunderland?
Sunderland is supplied by Northumbrian Water, covering 8 postcode districts across Tyne And Wear.
Is tap water in Sunderland safe to drink?
Yes. All tap water in Sunderland meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Does Sunderland have any harder-water postcodes?
SR7 is the hardest district at 150 ppm (moderately hard), though most of Sunderland averages 135 ppm.
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