Kensington Water Hardness & Quality Report (2026)

Sydney Water provides drinking water to Kensington, NSW, drawing from a network of major reservoirs including Warragamba Dam, Woronora Dam, Nepean Dam, Avon Dam, and Cordeaux Dam. These vast supplies are fed by protected watersheds in the Blue Mountains and Southern Highlands, managed within national parks. The water undergoes rigorous treatment at facilities like the Prospect Water Filtration Plant and others across Greater Sydney, ensuring a safe and reliable supply for millions of residents.

The geological makeup of the Greater Sydney Water Supply System is dominated by Triassic-age sandstones and shales from the Hawkesbury and Narrabeen Groups. These sedimentary rocks contain only small amounts of calcium and magnesium, and the absence of significant limestone or dolomite formations means the water is naturally very soft. The system primarily utilizes surface runoff from granitic and sedimentary terrains, with no reliance on major aquifers, further contributing to the low mineral content.

This exceptionally soft water means you won't typically find limescale buildup in appliances such as kettles, washing machines, or dishwashers, and it's often described as being gentle on skin and hair. Because the water is already so soft, installing a water softener is generally unnecessary and could even strip beneficial minerals. Sydney Water maintains the water's pH between 7 and 8, and reports indicate full compliance with lead and copper guidelines, with occasional trace PFAS detections managed through advanced filtration processes.