Water Hardness Breakdown for Sector GY10 1
Serving the community across sector GY10 1, mains tap water is supplied by Guernsey Water. Across the 8 postcodes within this distribution boundary, the baseline water hardness currently averages 140 PPM, falling into the slightly hard threshold.
Tap water in sector GY10 1 averages 140 PPM, presenting a manageable mineral level for the 8 local postcodes. Heating equipment operates with negligible efficiency loss (4% – 7%), though routine quarterly inspection of kettle elements remains beneficial.
The water supply managed by Guernsey Water in this region is primarily abstracted from upland reservoirs, lakes, and moorland catchments with impermeable granite or sandstone geology. This geological pathway limits mineral leaching, maintaining a low-to-moderate hardness baseline of 140 PPM throughout GY10 1.
In everyday household use, calcium and magnesium ions in 140 PPM water bind with soaps, producing chalky bathroom residue and scum on your morning cuppa. In sector GY10 1, washing laundry or dishware requires medium detergent volume with routine machine descaling. For personal grooming, individuals with dry skin or eczema sensitivity may experience skin tightness after showers in this slightly hard water environment.
Calibrating appliance water softening systems in GY10 1 prevents etched glassware and heating element burnouts. Based on Guernsey Water's official 140 PPM rating, Bosch dishwashers should be set to H01. Consult the interactive equipment guide below for custom brand settings across all 8 postcodes.