Water Hardness and Quality in Westminster
Supplied by United Utilities · Westminster
Westminster has moderately hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Westminster
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
172.5mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.33pH units
UK Average: 7.43 pH unitsBelow Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.52mg/l
UK Average: 0.45 mg/lAbove Average
LowAverageHigh
Water Hardness in Westminster
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
172.5mg/l CaCO₃Moderately Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Westminster has moderately hard water. You may notice some limescale buildup in your kettle and on taps over time. A regular descaling routine should be sufficient for most households.
Water Source Information
- Water Company
- United Utilities
- Supply Zone
- Westminster
- Source Type
- Groundwater
- Treatment Works
- Cheshire West and Chester Treatment Works
- Last Tested
- 2024-12-31
- Data Source
- United Utilities
Frequently Asked Questions
Is the water hard in Westminster?▾
Westminster has moderately hard water at 172.5 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Westminster tap water safe to drink?▾
Yes, tap water in Westminster is safe to drink. It is treated and tested by United Utilities and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Westminster?▾
The water hardness in Westminster is 172.5 mg/l CaCO₃, which is classified as "Moderately Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Westminster?▾
Water in Westminster is supplied by United Utilities, which serves the North West England region. The water comes from underground aquifers and is treated at Cheshire West and Chester Treatment Works.