ENVI ECOTECH SERVICES PRIVATE LIMITED… Consultancy Division is specialized in offering designing any Rainwater harvesting structure, capturing rainfall and runoff for local use is the key concept. Hard surface such as roof pavements and roads that decrease groundwater percolation constitute catchments and generate the high runoff which has to be diverted in to the storage tank recharged in to ground water regime through simple filtration injection well system for subsequent extraction by service wells.