Mumbai, Oct. 29 -- India's industrial production growth remained steady at 4 per cent in September this year due to the good performance of the manufacturing sector buoyed by GST rationalisation and festive demand, according to official data released on Tuesday. The factory output, measured in terms of the Index of Industrial Production (IIP), had expanded by 3.2 per cent in September 2024. Manufacturing output rose 4.8 percent in September 2025, up from 4 percent in the same month last year. Mining activity, however, slipped 0.4 percent compared with a modest 0.2 percent growth a year ago. Electricity generation increased 3.1 percent, improving from 0.5 percent in the year-ago period. The National Statistics Office (NSO) revised the indust...