What Is The Average Salinity Of Water?
What Is The Average Salinity Of Water? The average salinity is about 35 parts per thousand. What percentage of water has salinity? On average, seawater in the world’s oceans has a salinity of approximately 3.5%, or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams