Water Hardness and Quality in Finchley
Supplied by Affinity Water · Finchley (AF054)
Finchley has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Finchley
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
275mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.2pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.25mg/l
UK Average: 0.45 mg/lWell Below Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
29.9mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.96µg/l
UK Average: 1.08 µg/lAbove Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.126mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Finchley
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
275mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Finchley has hard water at 275 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
- Affinity Water
- Supply Zone
- Finchley (AF054)
- Source Type
- Groundwater
- Treatment Works
- Finchley Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Affinity Water
Frequently Asked Questions
Is the water hard in Finchley?▾
Yes, Finchley has hard water at 275 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Finchley tap water safe to drink?▾
Yes, tap water in Finchley is safe to drink. It is treated and tested by Affinity Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Finchley?▾
The water hardness in Finchley is 275 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Finchley?▾
Water in Finchley is supplied by Affinity Water, which serves the South East England region. The water comes from underground aquifers and is treated at Finchley Treatment Works.