International Science Community Association International Research Journal of Environmental Sciences 15 4 2026 10 22 Analysis of Water Quality after Holi festival using Physico-chemical parameters 8 12 EN Sirojiddin Muradov 1 Karshi state technical university, Karshi, Uzbekistan Dubey Arti 1 Department of Chemistry, VIVA College Virar (W), Maharashtra, India > Research Paper 2026 5 29 2026 10 22 Holi is one of the most celebrated festivals in India and is traditionally associated with the use of natural colours obtained from flowers, herbs, and plant materials. In recent years, synthetic industrial dyes containing hazardous chemicals and heavy metals have largely replaced natural colours during Holi celebrations. These synthetic colours are non-biodegradable and may adversely affect environmental and human health after being discharged into water bodies. The present study was conducted to evaluate the impact of Holi colours on water quality through analysis of selected physico-chemical parameters of wastewater collected after Holi celebrations. The wastewater sample was analysed for pH, total dissolved solids (TDS), total hardness, turbidity, colour, and chromium concentration using standard analytical methods. Instruments such as digital pH meter, nephelometer, colorimeter, and Atomic Absorption Spectrophotometer (AAS) were used for analysis. The obtained results revealed significant deterioration in water quality. Elevated levels of turbidity, hardness, dissolved solids, and chromium concentration were observed when compared with permissible limits recommended by the World Health Organization (WHO). The findings indicate that synthetic Holi colours contribute considerably to water pollution and may create ecological and health-related hazards. The study emphasizes the importance of promoting eco-friendly natural colours and water conservation practices for sustainable Holi celebrations. Copyright@ International Science Community Association