What is the density of a river?

The density of a river typically refers to the mass of water per unit volume, which is generally around 1,000 kg/m³ at standard temperature and pressure. However, the density can vary slightly due to factors such as temperature, salinity, and the presence of dissolved solids or sediments. For example, freshwater has a lower density compared to saltwater, which can be denser due to the dissolved salts. Thus, while the average density of river water is close to that of pure water, local conditions can affect this value.