Water Hardness and Quality in Holderness
Supplied by Yorkshire Water · Holderness (Kingston upon Hull)
Holderness has moderately hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Holderness
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
172.56mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.24pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.39mg/l
UK Average: 0.45 mg/lAverage
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
36.7mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
5.59µg/l
UK Average: 1.08 µg/lWell Above Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.07mg/l
UK Average: 0.19 mg/lWell Below Average
LowAverageHigh
Water Hardness in Holderness
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
172.56mg/l CaCO₃Moderately Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Holderness 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
- Holderness (Kingston upon Hull)
- Source Type
- Groundwater
- Treatment Works
- Kingston upon Hull Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Holderness?▾
Holderness has moderately hard water at 172.56 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Holderness tap water safe to drink?▾
Yes, tap water in Holderness 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 Holderness?▾
The water hardness in Holderness is 172.56 mg/l CaCO₃, which is classified as "Moderately Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Holderness?▾
Water in Holderness is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from underground aquifers and is treated at Kingston upon Hull Treatment Works.