**3. Re-use of treated water**

Treated water from the Sewage Treatment Plants (STPs) can be used to cater to horticultural needs, irrigation and partly for the daily water requirements. The city of Delhi for example has three sources of water: (1) Surface water supplied by river basins; (2) groundwater; (3) Treated water- the status of which will depend on the quality of treatment. The daily water requirement for Delhi is around 1120 MGD, of which 840 MGD is extracted from River Yamuna and 80 MGD is extracted from groundwater. Currently most of the treated water from STPs are discharged into the major drains and reach River Yamuna. As of 2019, out of 720 MGD generated as raw sewage, only 90 MGD is currently being utilized by various agencies for nonpotable purposes like horticulture and in STPs. Some of the advantages of utilizing treated wastewater are:

