Water Hardness and Quality in Fiddler's Hill
Supplied by Affinity Water · Harpenden (AF036)
Fiddler's Hill has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Fiddler's Hill
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
320mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.28mg/l
UK Average: 0.45 mg/lWell Below Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
28.6mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.99µg/l
UK Average: 1.08 µg/lAbove Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.097mg/l
UK Average: 0.19 mg/lBelow Average
LowAverageHigh
Water Hardness in Fiddler's Hill
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
320mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Fiddler's Hill has hard water at 320 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
- Harpenden (AF036)
- Source Type
- Groundwater
- Treatment Works
- Harpenden Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Affinity Water
Frequently Asked Questions
Is the water hard in Fiddler's Hill?▾
Yes, Fiddler's Hill has hard water at 320 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Fiddler's Hill tap water safe to drink?▾
Yes, tap water in Fiddler's Hill 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 Fiddler's Hill?▾
The water hardness in Fiddler's Hill is 320 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Fiddler's Hill?▾
Water in Fiddler's Hill is supplied by Affinity Water, which serves the South East England region. The water comes from underground aquifers and is treated at Harpenden Treatment Works.