Water Hardness Breakdown for Sector GY3 5
According to regional catchment disclosures for GY3 5, municipal tap water managed by Guernsey Water presents a mineral density of 140 PPM (9.8 English degrees). This data covers approximately 254 residential and commercial addresses in the GY3 area.
With a balanced reading of 140 PPM (9.8° Clark), water in GY3 5 exhibits a moderate mineral structure. While limescale accumulation is gradual, minor scale rings can form inside kettles and on boiler heat exchangers over 6–12 month periods (estimated thermal efficiency drag of 4% – 7%).
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 GY3 5.
Bathing and laundering across the 254 postcodes of GY3 5 is influenced by the 140 PPM mineral density. Surfactants in shampoos and detergents interact with calcium salts, requiring medium detergent volume with routine machine descaling to achieve thorough cleansing and preserve fabric softness.
Correct softener regeneration is critical when running appliances on 140 PPM water in GY3 5. Setting your dishwasher to H01 optimizes salt consumption while ensuring spot-free drying results across GY3.