Water Hardness and Quality in Watlington
Supplied by Thames Water · Chinnor Watlington & Chalgrove (OX5)
Watlington has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Watlington
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
278mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above 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
0.51mg/l
UK Average: 0.45 mg/lAbove Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
25mg/l
UK Average: 16.9 mg/lAbove 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
0.13mg/l
UK Average: 0.19 mg/lAbove Average
LowAverageHigh
Water Hardness in Watlington
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
278mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Watlington has hard water at 278 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
- Chinnor Watlington & Chalgrove (OX5)
- Source Type
- Mixed
- Treatment Works
- Chinnor Watlington & Chalgrove Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in Watlington?▾
Yes, Watlington has hard water at 278 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Watlington tap water safe to drink?▾
Yes, tap water in Watlington 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 Watlington?▾
The water hardness in Watlington is 278 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Watlington?▾
Water in Watlington is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from mixed sources and is treated at Chinnor Watlington & Chalgrove Treatment Works.