This document summarizes a study comparing the quality of waste water and purified water from a sewage treatment plant in Bhusawal city, India. Laboratory tests were conducted to analyze various physical and chemical parameters, including total suspended solids, chloride content, pH, and dissolved oxygen. The results showed improvements in water quality after treatment, with reductions in total suspended solids from 220 to 7 mg/L, chloride content from 260 to 159.95 mg/L, and increases in dissolved oxygen from 0.1 to 7.9 mg/L. The pH also increased from 5.8 to 6.65 after treatment. The findings indicate that the sewage treatment process effectively reduced pollutants and improved water quality, suggesting