subject: Best Rainwater Harvesting Company in India - RETAS [print this page] RETAS Enviro Solutions is a water engineering company focused on building practical and sustainable solutions for better water management. We help projects capture, store, manage, recharge and reuse water through engineered systems designed around specific site and project requirements. Our solutions cover rainwater harvesting, stormwater management, flood mitigation, groundwater recharge, underground water storage, water filtration and water management consultancy. With experience across commercial, industrial, residential and infrastructure projects, RETAS works with developers, architects, consultants, industries and institutions to address water challenges from planning and design to implementation.