Water Hardness and Quality in Derringham
Supplied by Yorkshire Water · Derringham (Kingston upon Hull)
Derringham has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Derringham
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
364.6mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.28pH units
UK Average: 7.43 pH unitsBelow Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.48mg/l
UK Average: 0.45 mg/lAverage
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
42.1mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.51µg/l
UK Average: 1.08 µg/lAverage
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.11mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Derringham
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
364.6mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Derringham has hard water at 364.6 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
- Yorkshire Water
- Supply Zone
- Derringham (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 Derringham?▾
Yes, Derringham has hard water at 364.6 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Derringham tap water safe to drink?▾
Yes, tap water in Derringham 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 Derringham?▾
The water hardness in Derringham is 364.6 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Derringham?▾
Water in Derringham 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.