Bombay High Court seeks report on change in colour of the Lonar lake water. The water of lake abruptly turned pink.
• The oval-shaped, crater lake formed after a meteorite hit the Earth some 50,000 years ago. It is a popular tourist hub located in Maharashtra’s Buldhana district.
• It is Located 500 km from Mumbai and over 90 km from Buldhana city,
• The Lake was declared a notified National Geo-heritage Monument in 1979. The lake is a part of the Lonar Wildlife Sanctuary declared in 2000.
The Lake had turned reddish-pink due to high salinity, acidity (pH) and an algal bloom.
This is not the first time the colour change has happened, although it is more evident this time.
In case of a natural phenomenon, there are fungi which generally give a greenish colour to water most of the times. The current colour change seems to be a biological change in the Lonar crater.
During the lockdown phase, there may not have been disturbance to water which led to this change.
Two issues of immediate concern highlighted for this situation are open defecation by Lonar citizens at the lake and discharge of sewage water from Lonar city freely entering the lake.
There is an example of a lake in Iran, where water becomes reddish due to an increase in salinity.