OFF COLOUR: The dirty green of Virginia Lake will decline as the temperature drops.PHOTO/ STUART MUNRO
As the days get shorter and rainier, Virginia Lake will slowly return to normal.
The lake, which turned a soupy green colour over summer due to algal bloom, is being regularly tested by the Whanganui District Council.
"The council samples and analyses Rotokawau Virginia Lake weekly to check the algae
cell densities," senior wastewater engineer Arno Benadie said.
"The lake reached its peak algae bloom at the end of February 2016 and the cell densities have been declining steadily since then."
The algae appeared because conditions were ideal for them to grow, but as the temperature lowers they will begin to disappear.