Water Hardness and Quality in Flackwell Heath
Supplied by Thames Water · Flackwell Heath (SWA31)
Flackwell Heath has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Flackwell Heath
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
300mg/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
0.61mg/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
0.9µg/l
UK Average: 1.08 µg/lAbove Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.1mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Flackwell Heath
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
300mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Flackwell Heath has hard water at 300 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
- Flackwell Heath (SWA31)
- Source Type
- Groundwater
- Treatment Works
- Flackwell Heath Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Thames Water
Frequently Asked Questions
Is the water hard in Flackwell Heath?▾
Yes, Flackwell Heath has hard water at 300 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Flackwell Heath tap water safe to drink?▾
Yes, tap water in Flackwell Heath 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 Flackwell Heath?▾
The water hardness in Flackwell Heath is 300 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Flackwell Heath?▾
Water in Flackwell Heath is supplied by Thames Water, which serves the London and Thames Valley region. The water comes from underground aquifers and is treated at Flackwell Heath Treatment Works.