Water Hardness and Quality in Blackburn
Supplied by United Utilities · West Pennine
Blackburn has moderately soft water with quality that meets all UK drinking water standards.
Check a specific postcode in Blackburn
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
99.5mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Below Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.48pH units
UK Average: 7.43 pH unitsAbove Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.65mg/l
UK Average: 0.45 mg/lWell Above Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
1.77mg/l
UK Average: 16.9 mg/lWell Below Average
LowAverageHigh
Water Hardness in Blackburn
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
99.5mg/l CaCO₃Moderately Soft
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Blackburn has soft water. This means less limescale buildup in your appliances, less soap needed for cleaning, and generally fewer issues with mineral deposits. You are unlikely to need a water softener.
Water Source Information
- Water Company
- United Utilities
- Supply Zone
- West Pennine
- Source Type
- Mixed
- Treatment Works
- Blackburn with Darwen Treatment Works
- Last Tested
- 2024-12-31
- Data Source
- United Utilities
Frequently Asked Questions
Is the water hard in Blackburn?▾
No, Blackburn has soft water at just 99.5 mg/l CaCO₃. You are unlikely to experience significant limescale issues.
Is Blackburn tap water safe to drink?▾
Yes, tap water in Blackburn 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 Blackburn?▾
The water hardness in Blackburn is 99.5 mg/l CaCO₃, which is classified as "Moderately Soft". This is below the UK national average of 170 mg/l.
Who supplies water to Blackburn?▾
Water in Blackburn is supplied by United Utilities, which serves the North West England region. The water comes from mixed sources and is treated at Blackburn with Darwen Treatment Works.