Water Hardness and Quality in Cassington
Supplied by Thames Water · Oxford West & Kidlington (OX26)
Cassington has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Cassington
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
246mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above 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
0.4mg/l
UK Average: 0.45 mg/lAverage
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
17mg/l
UK Average: 16.9 mg/lAverage
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
0.11mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Cassington
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
246mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Cassington has hard water at 246 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
- Oxford West & Kidlington (OX26)
- Source Type
- Mixed
- Treatment Works
- Oxford West & Kidlington Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in Cassington?▾
Yes, Cassington has hard water at 246 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Cassington tap water safe to drink?▾
Yes, tap water in Cassington 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 Cassington?▾
The water hardness in Cassington is 246 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Cassington?▾
Water in Cassington is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from mixed sources and is treated at Oxford West & Kidlington Treatment Works.