Northumbrian Water supplies water to 2.7 million people in the north east of England. The supply comes primarily from Kielder Water and other upland reservoirs, producing moderately soft water.
At 101 ppm on average, Northumbrian Water ranks as slightly hard water.
See how it compares across the UK in our 50 softest water areas ranking.
Common questions about Northumbrian Water water hardness
How do I check Northumbrian Water hardness by postcode?
Enter your postcode in the checker on the WaterHard.uk homepage, or find your district in the table above. Northumbrian Water serves 122 postcode districts across North East England, ranging from 50 to 150 ppm.
Is there a Northumbrian Water hardness checker or map?
Northumbrian Water publishes water quality data by postcode, but it can be scattered across PDF reports. WaterHard.uk compiles it into the searchable table above so you can find your district's reading in one place.
How hard is Northumbrian Water water in my area?
It depends on your exact postcode. Northumbrian Water supplies range from 50 ppm to 150 ppm, averaging 101 ppm (slightly hard) across 122 postcode districts in North East England. Use the table above to find your specific district.
Is Northumbrian Water water hard or soft?
Northumbrian Water averages 101 ppm, classified as slightly hard. Most households on Northumbrian Water see little to no limescale build-up, though individual postcodes can vary, so check the table above for your district.
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