Background: This study evaluates water quality in Awule and Ala (FUTA) streams in Akure, Ondo State, Nigeria. The study employed a combined approach of insect biotic indices and physicochemical parameters in the assessment of the water quality. Aquatic insects and water were sampled for a period of six months. All insects collected were identified to family level. Physicochemical parameters of the waterbodies were measured across three sites in each stream. Various indices (BMWP, ASPT, FBI) were applied to assess water quality.
Results: The BMWP, ASPT, and FBI indices revealed differences between the streams, with Awule stream showing higher scores, indicating better water quality and lower pollution levels compared to Ala (FUTA) stream.This study indicates similarities in pH across sites, nearly neutral conditions conducive to aquatic life. Temperature, water depth, and flow rate exhibited slight variations, potentially influencing habitat diversity. Electrical conductivity, total dissolved solids, and dissolved oxygen levels varied within acceptable ranges. Elevated nitrate and phosphate levels at specific sites suggested possible agricultural runoff impacts.
Conclusion: In conclusion, both streams generally meet recommended standards, but Awule stream exhibits slightly superior conditions based on the dominance of pollution-intolerant insect families and lower pollution index scores. Continued monitoring and targeted interventions are vital for sustaining and enhancing the health of these aquatic ecosystems.