This report has been prepared by the Centre for Science and Environment (CSE) as part of its knowledge support for the National Mission for Clean Ganga (NMCG) to develop water sensitive cities in the Ganga basin. This report showcases the potential of run-off infiltration in stormwater harvesting systems in parks and green open spaces in five cities—Lucknow, Kanpur, Varanasi, Prayagraj and Moradaba —in Uttar Pradesh, India’s largest and most populous state, which falls in the Ganga basin. The report also presents city profiles, pilot case studies of select parks for implementation of stormwater harvesting strategies, and templates for data collection and implementation of stormwater harvesting.