Water Hardness and Quality in Castle
Supplied by Yorkshire Water · Castle (North Yorkshire)
Castle has moderately hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Castle
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
194.78mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.23pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.31mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
11.6mg/l
UK Average: 16.9 mg/lBelow Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
1.18µg/l
UK Average: 1.08 µg/lWell Above Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.06mg/l
UK Average: 0.19 mg/lWell Below Average
LowAverageHigh
Water Hardness in Castle
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
194.78mg/l CaCO₃Moderately Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Castle 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
- Castle (North Yorkshire)
- Source Type
- Mixed
- Treatment Works
- North Yorkshire Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Castle?▾
Castle has moderately hard water at 194.78 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Castle tap water safe to drink?▾
Yes, tap water in Castle 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 Castle?▾
The water hardness in Castle is 194.78 mg/l CaCO₃, which is classified as "Moderately Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Castle?▾
Water in Castle is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from mixed sources and is treated at North Yorkshire Treatment Works.