Euglenophyta are a group of algae that occur in water polluted by organic matter, which makes them a good
indicator for organic pollution. This study aimed to determine the diversity of Euglenophyta, the environmental
conditions favourable to their development and their implication in the sustainability and quality of the water in
Loumbila reservoir. Algal and chemical water samples were collected monthly between January 2015 and June
2015. Phytoplankton species were identified under a light microscope using a Fuchs-Rosenthal chamber for algal
cell counting. In total, 34 species of Euglenophyta were identified, four of which are new to the algal flora of Burkina
Faso. The abundance and number of species of the genera Euglena and Phacus were significantly (p

abundance, Euglena, indicator species, organic pollution