Mail id CGWB Noc water flow Water Audit water usage efficient use essential step water sourcing water footprint water resources approval process detailed analysis potential sources permissible limits critical component water conservation corrective measures system optimizations Allegiance Enterprise Sustainable Compliance technological upgrades groundwater extraction regulatory requirements conservation strategies comprehensive evaluation operational cost savings No Objection Certificate environmental stewardship actionable recommendations water consumption patterns Central Ground Water Board long-term water sustainability Expert Allegiance Water Management national water management policies overall water sustainability practices broader corporate sustainability goals