What colour is our water meant to be?

Colour in water originates mainly from natural drainage through soil and vegetation in a surface catchment. Human perception of colour varies depending on the quantity

of water. Consequently the Australian Drinking Water Guidelines’ value for colour is based on what is noticeable in a glass of water and is generally accepted as 15HU (Hazen Units). The raw water we extract is 6HU, which reduces to zero (or totally clear) once treated.