10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 3 2013 (July - September) The present work was carried out on studying the impact on diversity of aquatic fungi to assess the water quality. Tamiraparani river water was assessed at Kuzhithurai study stations in the study month of September, 2012, With reference to aquatic fungal diversity. During the study, 12 aquatic fungal species fungal species belonging to lessThan i greaterThan Aspergillus sp., Fusarium sp., Penicillum sp., lessThan /i greaterThan were isolated and identified. Maximum percentage of fungal species identified is lessThan i greaterThan Aspergillus sp., lessThan /i greaterThan and the lowest is lessThan i greaterThan Sporothrix sp., lessThan /i greaterThan and lessThan i greaterThan Phialophora sp.,. lessThan /i greaterThan The present investigation revealed that the difference in the percent of occurrence, distribution of aquatic fungi in Tamiraparani river. K. CHRISTAL THANGA PADMINI, B. CHRISTUDHAS WILLIAMS AND M. MURUGAN Fungi, drinking Water, Aspergillus sps., 1119-1124