Investment plan (for water utility company) to reduce customer water demand

create an investment plan for ways of reducing customer water demand. In short find ways to lower water consumption in the area and back the strategy up with numbers (financially).

The current water consumption is 170l/head/day and should get it down to 125l/head/day (or more) over a period of 30 year/by 2050 (Duration of this investment strategy) by:
• Implementation of new technology (Water meter/apps, Efficient Appliances, innovation)
• Customer Behaviour (Tariffs, smart home visits, marketing/campaigning/ advertisements)
• Powerful partnerships and working Local authorities and housing associations (not that important)