The present study is undertaken to evaluate pollution status of estuaries in Ratnagiri District. For this piece of work five stations from four different estuaries have been selected depending upon a visible inflow of domestic sewage. The water and soil samples were collected simultaneously from their locations. It is observed that the highest salinity is at Bandhkbind. At this place DO is lowest and BOD is highest, amongst the five stations. The effect of water quality is studied by analysing the leaves of Avicennia officinalis for chlorophylls, carbohydrates and polyphenols. It is seen that highest chlorophyll content in the leaves exists with lowest BOD and salinity. Carbohydrate levels go hand in hand with chlorophylls. However, polyphenols do not show this trend. The lowest chlorophyll value is 41.9 mg/100 g fr. wt., while the highest value is 100.47 mg/100 g fr. wt. This gives the variation of 58 %.