United Kingdom Water Quality
Browse water hardness, PFAS levels, and quality ratings across 12 regions and 40 cities. Sourced from the DWI Data Portal.
40
Cities
12
Regions
140 mg/L
Avg Hardness
🟠 Hard
Avg Category
🔴 Hardest: East of England (271 mg/L)
🟢 Softest: Scotland (20 mg/L)
East Midlands
🔴 Very Hard4 cities181 mg/L · 12.7 °Clark
View cities →East of England
🔴 Very Hard2 cities271 mg/L · 19.0 °Clark
View cities →Greater London
🔴 Very Hard7 cities260 mg/L · 18.2 °Clark
View cities →North East
🟡 Moderately Hard1 city80 mg/L · 5.6 °Clark
View cities →North West
🟡 Moderately Hard5 cities75 mg/L · 5.3 °Clark
View cities →Northern Ireland
🟡 Moderately Hard1 city70 mg/L · 4.9 °Clark
View cities →Scotland
🟢 Soft2 cities20 mg/L · 1.4 °Clark
View cities →South East
🔴 Very Hard5 cities264 mg/L · 18.5 °Clark
View cities →South West
🔴 Very Hard3 cities182 mg/L · 12.8 °Clark
View cities →Wales
🟢 Soft2 cities38 mg/L · 2.7 °Clark
View cities →West Midlands
🟡 Moderately Hard4 cities96 mg/L · 6.7 °Clark
View cities →Yorkshire and the Humber
🟠 Hard4 cities143 mg/L · 10.0 °Clark
View cities →