Water Hardness and Quality in Bolton
Supplied by United Utilities · Astley Bridge
Bolton has slightly hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Bolton
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
115.4mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Below Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.37pH units
UK Average: 7.43 pH unitsAverage
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
1.04mg/l
UK Average: 0.45 mg/lWell Above Average
LowAverageHigh
Water Hardness in Bolton
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
115.4mg/l CaCO₃Slightly Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Bolton 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
- United Utilities
- Supply Zone
- Astley Bridge
- Source Type
- Mixed
- Treatment Works
- Bolton Treatment Works
- Last Tested
- 2024-12-31
- Data Source
- United Utilities
Frequently Asked Questions
Is the water hard in Bolton?▾
Bolton has moderately hard water at 115.4 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Bolton tap water safe to drink?▾
Yes, tap water in Bolton is safe to drink. It is treated and tested by United Utilities and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Bolton?▾
The water hardness in Bolton is 115.4 mg/l CaCO₃, which is classified as "Slightly Hard". This is below the UK national average of 170 mg/l.
Who supplies water to Bolton?▾
Water in Bolton is supplied by United Utilities, which serves the North West England region. The water comes from mixed sources and is treated at Bolton Treatment Works.