Water Hardness and Quality in Wormley
Supplied by Thames Water · Witley (G9)
Wormley has slightly hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Wormley
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
143mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Below Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.4pH units
UK Average: 7.43 pH unitsAverage
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.41mg/l
UK Average: 0.45 mg/lAverage
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
9mg/l
UK Average: 16.9 mg/lBelow Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.9µg/l
UK Average: 1.08 µg/lAbove Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.14mg/l
UK Average: 0.19 mg/lAbove Average
LowAverageHigh
Water Hardness in Wormley
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
143mg/l CaCO₃Slightly Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Wormley 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
- Thames Water
- Supply Zone
- Witley (G9)
- Source Type
- Groundwater
- Treatment Works
- Witley Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in Wormley?▾
Wormley has moderately hard water at 143 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Wormley tap water safe to drink?▾
Yes, tap water in Wormley is safe to drink. It is treated and tested by Thames Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Wormley?▾
The water hardness in Wormley is 143 mg/l CaCO₃, which is classified as "Slightly Hard". This is below the UK national average of 170 mg/l.
Who supplies water to Wormley?▾
Water in Wormley is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from underground aquifers and is treated at Witley Treatment Works.