Water Hardness and Quality in Marr
Supplied by Yorkshire Water · Mexborough (Doncaster)
Marr has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Marr
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
281.69mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.15pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.32mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
19.93mg/l
UK Average: 16.9 mg/lAverage
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.3µg/l
UK Average: 1.08 µg/lBelow Average
LowAverageHigh
Water Hardness in Marr
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
281.69mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Marr has hard water at 281.69 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
- Yorkshire Water
- Supply Zone
- Mexborough (Doncaster)
- Source Type
- Groundwater
- Treatment Works
- Doncaster Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Marr?▾
Yes, Marr has hard water at 281.69 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Marr tap water safe to drink?▾
Yes, tap water in Marr 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 Marr?▾
The water hardness in Marr is 281.69 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Marr?▾
Water in Marr is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from underground aquifers and is treated at Doncaster Treatment Works.