The other risk to bathing waters caused by heavy rain is diffuse pollution washed into rivers and coastal areas from the countryside and towns as a result of downpours.
A paper published in 2011 by Christpher Kyba, a physicist at Free University, in Berlin, found that light pollution washes out the polarization of moonlight, which could have a detrimental effect on dung beetles and other insects, at least around urban areas.
the ecology of the region is still in recovery with damage caused by both natural pollution (sea salt) and man-made pollution (chemicals washed into the freshwater and the bay) still showing dramatic effects on both the marine and land-dwelling wildlife.
The weather can also have a significant impact, with heavy rainfall washing pollution into the sea.
Heavy rain and flooding is blamed for washing pollution from town and sewers down to the sea.
Mallathahalli lake is affected by several sources of pollution including washing of clothes, animals, vehicles and even bathing, especially on the northern and eastern banks of the lake.
And finally, Ward says, carbon emissions are also increasing the severity of reef-smashing storms, and raising the sea level, which will drown some reefs and increase the amount of pollution that is washed into the water.
Pollution can be washed into the sea from agricultural run-off, poor plumbing, septic tanks and dog mess.
What is more, despite reductions in pesticide and nitrogen pollution, run-off washed from farmers' fields is still pushing nitrogen beyond critical levels in many areas - particularly in lowland Western Europe.
They assume washing farmland producing secondary pollution by pesticides as well as the SAS from wastewater drain into the river.
