WG
WaterGrade

Water Hardness in St Mary's

St Mary's has very hard water at 343.79 mg/l CaCO₃. This is above the UK national average of 197.72 mg/l. You may notice limescale buildup on taps, in kettles, and around showerheads.

343.79

mg/l CaCO₃

Very HardUK average: 197.72 mg/l
343.79
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Very Hard Water Mean?

With a hardness of 343.79 mg/l, St Mary's has very hard water. This level of hardness is common in areas supplied from chalk and limestone aquifers in the South East of England.

You will likely notice white limescale deposits on taps, showerheads, and inside your kettle. Over time, limescale can reduce the efficiency of boilers and heating systems, increasing energy costs. A water softener can help prevent these issues.

Water Supplier

Water Company
Yorkshire Water
Supply Zone
St Mary's (East Riding of Yorkshire)
Source Type
Groundwater
Treatment Works
East Riding of Yorkshire Treatment Works

Full Water Quality Report for St Mary's

See all 7 water quality parameters including pH, chlorine, lead, nitrate, fluoride and more.

View →

Frequently Asked Questions

Is water hard in St Mary's?▾
Yes, St Mary's has hard water at 343.79 mg/l CaCO₃, classified as "Very Hard". You will likely notice limescale buildup on taps, in kettles, and around showerheads. A water softener or regular descaling can help manage this.
What is the hardness of water in St Mary's?▾
The water hardness in St Mary's is 343.79 mg/l CaCO₃ (milligrams per litre of calcium carbonate). This is classified as "Very Hard" on the standard UK scale and is above the national average of 197.72 mg/l. Water is supplied by Yorkshire Water from underground aquifer sources.
Who supplies water to St Mary's?▾
Water in St Mary's is supplied by Yorkshire Water, which covers the Yorkshire and the Humber region. The water is sourced from underground aquifers (boreholes) and treated at East Riding of Yorkshire Treatment Works before distribution.
Check another postcode →Browse all hard water areas →