BWSSB was investigating complaints about contamination, leakage, blockage and water supply. Surface signs showed the affected area. They did not reveal the exact condition inside the pipeline. Inspections found deposits, leakage, stone obstruction, illegal connections, displaced joints, encrustation, roots, foreign objects and broken pipe sections. Some locations had Grades 4 and 5 defects. Blockages of up to 80% were also recorded.