Poisar River is a river in Mumbai

Mumbai

Mumbai , formerly known as Bombay in English, is the capital of the Indian state of Maharashtra. It is the most populous city in India, and the fourth most populous city in the world, with a total metropolitan area population of approximately 20.5 million...

, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

. It begins in the Sanjay Gandhi National Park

Sanjay Gandhi National Park

Sanjay Gandhi National Park , previously Borivali National Park, is a large protected area in the northern part of suburban Mumbai city in Maharashtra State in India...

 and empties into the Marve Creek and finally into the Arabian Sea

Arabian Sea

The Arabian Sea is a region of the Indian Ocean bounded on the east by India, on the north by Pakistan and Iran, on the west by the Arabian Peninsula, on the south, approximately, by a line between Cape Guardafui in northeastern Somalia and Kanyakumari in India...

. The river is nothing more than a mere stream when it begins and is contaminated with industrial effluents and sewage. There was a time when the water was clean and the people used to use it for household purposes.
In Mumbai, during the festival of Ganesh Chaturthi, the statue of the Lord Ganpati (Hindu Religion) , was drowned in this river too. Nowadays, it is not done, since the river is dirty.
At Poisar bridge, under which this flows, there is a building 'Pra-Mira Apts' overlooking this river. 'Sai Haven ' is another building on the banks. Recently, more high rise buildings have come up. In 2006 during the major flood in Mumbai, Poisar river had flooded and water had overflown the banks into the building compound, contaminating the Water Tank. Those living in the surroundings had undergone great distress. Diseases spread. Some are still recovering the same. Especially skin rashes.

There is also the Jeri Meri Temple, on the other side of the Bridge.