Water Hardness and Quality in Little Stanmore
Supplied by Affinity Water · Stanmore/Mill Hill (AF052)
Little Stanmore has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Little Stanmore
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
353mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.1pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.3mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
26.9mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
2.75µg/l
UK Average: 1.08 µg/lWell Above Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.105mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Little Stanmore
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
353mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Little Stanmore has hard water at 353 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
- Stanmore/Mill Hill (AF052)
- Source Type
- Groundwater
- Treatment Works
- Stanmore/Mill Hill Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Affinity Water
Frequently Asked Questions
Is the water hard in Little Stanmore?▾
Yes, Little Stanmore has hard water at 353 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Little Stanmore tap water safe to drink?▾
Yes, tap water in Little Stanmore 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 Little Stanmore?▾
The water hardness in Little Stanmore is 353 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Little Stanmore?▾
Water in Little Stanmore is supplied by Affinity Water, which serves the South East England region. The water comes from underground aquifers and is treated at Stanmore/Mill Hill Treatment Works.