Water Hardness and Quality in Derby Zone 13
Supplied by Severn Trent Water · Derby Zone 13
Derby Zone 13 has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Derby Zone 13
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
225.2mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.54pH units
UK Average: 7.43 pH unitsAbove Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.22mg/l
UK Average: 0.45 mg/lWell Below Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
10mg/l
UK Average: 16.9 mg/lBelow Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.71µg/l
UK Average: 1.08 µg/lAverage
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.31mg/l
UK Average: 0.19 mg/lWell Above Average
LowAverageHigh
Water Hardness in Derby Zone 13
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
225.2mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Derby Zone 13 has hard water at 225.2 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
- Severn Trent Water
- Supply Zone
- Derby Zone 13
- Source Type
- Mixed
- Treatment Works
- Derby Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Severn Trent Water
Frequently Asked Questions
Is the water hard in Derby Zone 13?▾
Yes, Derby Zone 13 has hard water at 225.2 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Derby Zone 13 tap water safe to drink?▾
Yes, tap water in Derby Zone 13 is safe to drink. It is treated and tested by Severn Trent Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Derby Zone 13?▾
The water hardness in Derby Zone 13 is 225.2 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Derby Zone 13?▾
Water in Derby Zone 13 is supplied by Severn Trent Water, which serves the West Midlands region. The water comes from mixed sources and is treated at Derby Treatment Works.