Water Hardness and Quality in Port Mahon
Supplied by Yorkshire Water · Walkley (Sheffield)
Port Mahon has soft water with quality that meets all UK drinking water standards.
Check a specific postcode in Port Mahon
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
46.2mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Below Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.59pH units
UK Average: 7.43 pH unitsAbove Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.52mg/l
UK Average: 0.45 mg/lAbove Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
2.8mg/l
UK Average: 16.9 mg/lWell Below Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.16µg/l
UK Average: 1.08 µg/lWell Below Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.07mg/l
UK Average: 0.19 mg/lWell Below Average
LowAverageHigh
Water Hardness in Port Mahon
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
46.2mg/l CaCO₃Soft
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Port Mahon 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
- Yorkshire Water
- Supply Zone
- Walkley (Sheffield)
- Source Type
- Reservoir
- Treatment Works
- Sheffield Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Port Mahon?▾
No, Port Mahon has soft water at just 46.2 mg/l CaCO₃. You are unlikely to experience significant limescale issues.
Is Port Mahon tap water safe to drink?▾
Yes, tap water in Port Mahon 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 Port Mahon?▾
The water hardness in Port Mahon is 46.2 mg/l CaCO₃, which is classified as "Soft". This is below the UK national average of 170 mg/l.
Who supplies water to Port Mahon?▾
Water in Port Mahon is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from upland reservoirs and is treated at Sheffield Treatment Works.