ROI Workings- Residential



Unit size, Nos:
Population Equivalent (PE):
No of person per unit:
Total Water Supplied:
Water Supply, 150 LPCD:
General cleaning, Litres(1 l/m2/day):
Total Common area of the building, m2:
Gardening/Irrigation, Litres(5.5 l/m2/day):
Gardening/Irrigation Aera Avaialble, m2:
Water requirement @ 100 litre/ wash/car:
Car Wash- 100 litre/ wash/car- No of Cars:

Water Requirement:

Consumption Type General Purpose (95 LPCD) Toilet Flushing (45 LPCD) Drinking /Kitchen (10 LPCD) Gardening Floor Cleaning Car Wash
Quantity of Water consumed
Percentage Consumption


Water Balance
Water Requirement, KLD Fresh Water Supply, in KLD
Water Consumption, KLD Recycled Water Supply, in KLD




Source Type Bore wells Municipal Water Tanker (10 KL) STP Recycled Water WTP Treated Water Sewage Disposal
No of units 1 1
Capacity of Source Type/Tanks
Percentage dependence on Source

Source Availability in %
Water Availability:



Source Type Bore wells Municipal Water Tanker STP Recycled Water WTP Treated Water Sewage disposal
Cost per KL per day
Total Cost per day
Cost of Treatment per month

Total Cost for Souring/purchase of water per month
STP Cost of Treatment per month
WTP Operating Cost per month
Cost for Sewage Disposal per month


Cost of Water