Given that you have set the stage for honest answers here are some further questions;

1)What % of households are not cooperating in meeting the restrictions to bring us below 500 m l per day
2)Are these households widely dispersed or concentrated in certain areas
3)If they are concentrated where are these household - what areas precisely
4)Why is the council spending very scarce resources installing flow meters at homes that are not saving
5)Apart from hollow threats and expensive flow meters what steps are being taken against delinquent households
6)Why not cut off delinquent households with 24 hour prior notice with reconnection subject to a massive fine
7)Why not deploy more resources to enforce restrictions
8)Are borehole drillers showing a willingness to help access underground water
9)If not why not. Is there too much red tape 
10) The same question in respect of desalination contractors

The key to avoiding disaster is reducing usage and the city is not being tough enough