Water Hardness and Quality in Upper Basildon
Supplied by Thames Water · Tilehurst Village (R13)
Upper Basildon has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Upper Basildon
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
309mg/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
0.34mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
29mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
1µg/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 Upper Basildon
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
309mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Upper Basildon has hard water at 309 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
- Tilehurst Village (R13)
- Source Type
- Mixed
- Treatment Works
- Tilehurst Village Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in Upper Basildon?▾
Yes, Upper Basildon has hard water at 309 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Upper Basildon tap water safe to drink?▾
Yes, tap water in Upper Basildon 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 Upper Basildon?▾
The water hardness in Upper Basildon is 309 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Upper Basildon?▾
Water in Upper Basildon is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from mixed sources and is treated at Tilehurst Village Treatment Works.