Water Hardness and Quality in Redhill
Supplied by Severn Trent Water · Gedling Zone 13
Redhill has moderately hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Redhill
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
175mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
8.12pH units
UK Average: 7.43 pH unitsWell Above Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.3mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
9.74mg/l
UK Average: 16.9 mg/lBelow Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.14µg/l
UK Average: 1.08 µg/lWell Below Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.08mg/l
UK Average: 0.19 mg/lBelow Average
LowAverageHigh
Water Hardness in Redhill
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
175mg/l CaCO₃Moderately Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Redhill 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
- Severn Trent Water
- Supply Zone
- Gedling Zone 13
- Source Type
- Mixed
- Treatment Works
- Nottingham Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Severn Trent Water
Frequently Asked Questions
Is the water hard in Redhill?▾
Redhill has moderately hard water at 175 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Redhill tap water safe to drink?▾
Yes, tap water in Redhill 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 Redhill?▾
The water hardness in Redhill is 175 mg/l CaCO₃, which is classified as "Moderately Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Redhill?▾
Water in Redhill is supplied by Severn Trent Water, which serves the West Midlands region. The water comes from mixed sources and is treated at Nottingham Treatment Works.