Maximum annual mean of chlorophyll

Locations that are presently at less than (green) or exceed (orange and red) the water quality guideline value of a maximum annual mean of 0.45 μg L-1 chlorophyll. Orange zones show areas that exceed the guideline values, with chlorophyll values of 0.45–0.8 μg L-1. Red zones show areas of greatest concern with >0.8 μg L-1 chlorophyll. The level of fading (right panel) indicates the level of confidence in the estimates with faded areas being more uncertain.