Blue Dot waters are our best quality waters. They have the highest ecological quality of all our waters and often a greater diversity of species that are sensitive to pollution.
Blue Dot waters have a natural physical form that has not been changed much by human activities. For example, they are not physically altered by straightened of the river channel or by the presence of bank stabilisation through hard engineering.
High status waters very often serve as tributaries and headwaters for larger downstream water bodies. This location in the catchment means that high status headwaters have a positive effect on downstream water bodies.
They can also serve as an ark where sensitive species survive during pollution events and can then recolonise the polluted water downstream when it is restored. This is due to the connectivity in water catchments where water moves from the headwaters downstream to the coastal waters.
Of course, the opposite can also happen. Many of our Blue Dots are coastal water bodies that could be impacted by rivers up stream that are not Blue Dots themselves. It is always important that the connectivity of catchments is considered.