Abstract: Mahapur and Saai, both the reservoirs are constructed on Manjra River in Latur tehsil in the Marathwada region of Maharashtra. The Mahapur reservoir is just 10kms and Sai reservoir is just 08 kms away from the Latur town. The water bodies are, mainly used for drinking and irrigation purposes. The study was carried out over a period of one year from March 2018 to February 2019 to examine the different concentrations of fluorides and algal diversity at selected two sites. From findings an average concentration of fluoride in Mahapur water body at both sites was 0.34mg/lit.,and in Saai water body it was 0.32mg/lit, at site S1and 0.35mg/lit, at site S2. (Table.1) The fluoride concentration was maximum in the month of May and it was minimum in the month of December at each site.As far as algal diversity concern a total of 182 taxa under 63 genera were encountered from both the reservoirs. The present paper deals with only the common taxa (82) under (35) genera encountered from both the reservoirs (Table 2) belonging to chlorophyceae cyanophyceae euglenophyceae and xanthophyceae .The members of chlorophyceae were found dominant.

Key words- Fluoride, Mahapur, Saai reservoir, Manjra River, Renapur.

| DOI: 10.17148/IARJSET.2021.8315