The 1930 Hillsborough Terrace Water Treatment Station had a maximum continuous capacity slightly over 30 megalitres per day (ML/d). By 1970 peak demands exceeded 45 ML/d with the average annual daily demand being around 25 ML/d, but the site was too small to expand. So Waiora Terrace Station, Glenview (opposite Hamilton Gardens), was commissioned in mid 1971. It was designed for a maximum capacity of 65 ML/d, expandable to 190 ML/d, was increased to approximately 85ML/d with the addition of polymer dosing in the 1980s and by 2010 had a capacity of 106 ML/d. It was built to a Patterson Candy design with coagulation, rapid sand gravity filtration and chlorine gas disinfection.