Salinity of the East River

Salinity is the amount of salt inside of the water. This is very important because if there is too much salt it will kill fish that live in fresh water and if there is not enough salt it can kill salt water fish as well. From salinity you can determine if the water is brackish, fresh, or just salt water. From the salinity you can tell if the rivers are flooding with the tide due to the fact that more ocean water is entering the rivers which creates brackish water. Brackish water is a mixture of fresh and salt water together, which is creating an estuary!
Salinity is measured by using a hydrometer. A hydrometer is used by taking water from a ocean or a river then you put it on flat surface. Leave it for about a minute and then it will tell you the of salnity of the water. From all the rivers we tested "The East River" is the third highest salnity tested. These are the salinity of the rivers we explored East river 25ppt, Newtown creek 6ppt, Hudson river 19ppt, Pier 26 20ppt, New York Aquarium 28ppt, Bronx river 7ppt, Gowanus canal 21ppt,and Dead Horse Bay 33ppt.