Water Hardness and Quality in Knowsthorpe
Supplied by Yorkshire Water · Horsforth (Leeds)
Knowsthorpe has slightly hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Knowsthorpe
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
121.37mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Below Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.29pH units
UK Average: 7.43 pH unitsBelow Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.34mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
4.99mg/l
UK Average: 16.9 mg/lWell Below Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
1.05µg/l
UK Average: 1.08 µg/lAbove Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.09mg/l
UK Average: 0.19 mg/lBelow Average
LowAverageHigh
Water Hardness in Knowsthorpe
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
121.37mg/l CaCO₃Slightly Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Knowsthorpe has moderately hard water. You may notice some limescale buildup in your kettle and on taps over time. A regular descaling routine should be sufficient for most households.
Water Source Information
- Water Company
- Yorkshire Water
- Supply Zone
- Horsforth (Leeds)
- Source Type
- Reservoir
- Treatment Works
- Leeds Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Knowsthorpe?▾
Knowsthorpe has moderately hard water at 121.37 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Knowsthorpe tap water safe to drink?▾
Yes, tap water in Knowsthorpe is safe to drink. It is treated and tested by Yorkshire Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Knowsthorpe?▾
The water hardness in Knowsthorpe is 121.37 mg/l CaCO₃, which is classified as "Slightly Hard". This is below the UK national average of 170 mg/l.
Who supplies water to Knowsthorpe?▾
Water in Knowsthorpe is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from upland reservoirs and is treated at Leeds Treatment Works.