Water Hardness and Quality in East Horsley
Supplied by Thames Water · Guildford District North (G8)
East Horsley has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in East Horsley
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
287mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.3pH units
UK Average: 7.43 pH unitsBelow Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.65mg/l
UK Average: 0.45 mg/lWell Above Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
24mg/l
UK Average: 16.9 mg/lAbove Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
1.9µg/l
UK Average: 1.08 µg/lWell Above Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.12mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in East Horsley
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
287mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
East Horsley has hard water at 287 mg/l. You will likely experience significant limescale buildup in kettles, boilers, and on bathroom surfaces. Many residents in your area use water softeners or anti-limescale products.
Water Source Information
- Water Company
- Thames Water
- Supply Zone
- Guildford District North (G8)
- Source Type
- Groundwater
- Treatment Works
- Guildford District North Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in East Horsley?▾
Yes, East Horsley has hard water at 287 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is East Horsley tap water safe to drink?▾
Yes, tap water in East Horsley 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 East Horsley?▾
The water hardness in East Horsley is 287 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to East Horsley?▾
Water in East Horsley is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from underground aquifers and is treated at Guildford District North Treatment Works.