The pathogeneous and opportunistic marine micro organisms may causes some sudden out breaks in the coastal environments. To monitoring the marine quality the scientists were using bacterial indicators in world-wide. Marine environments are being used as universal dustbin which has led to dreadful changes in natural resources of the coastal zone system. Total heterotrophic bacteria are the major components of marine as well as estuarine ecosystems and they play an important role in the degradation of organic matter and in the recycling of nutrients in the sea and their abundance is influenced by bioticand abiotic environmental factors. In present study, Agni Theertham (station 1) reported more bacterial load than Olaikuda (station 2) because Agni Theertham is a famous south Indian holy perennial pilgrim centre of Rameswaram Island, this area was polluted by the devotes from different parts of the country through fecal contamination and dumping. Most of the hotels and house hold wastes are discharged in to the sea and runoff water during monsoon season brings the animal's waste, human wastes that contain faecal coliforms and elevated Vibrios population which will contaminating the sea water causing serious outbreaks.

Keywords: Bacteriological Assessment, THB Analysis