Water conservation is of great importance to everyone. Having been a resident in Cyprus where reservoirs ran dry due to lack of rain management is of great importance.
1, when you replace pipes due to water leakages you should advise the nearby houses if major leaks were found as this may have affected their damp proofing especially in old houses.
2. Water wastage by householders is a major consumption. Better ways of stopping waste could be found. ie when people run taps to get hot water. This just goes down the drain. Water companies could invest in finding better economical ways of stopping this. ie a return line to circulate back to the tank. Whilst you are interested in selling water conservation should be a priority. Any saving method must be cheap to install and easy to operate so that all levels of the community will install it or have it installed ie councils.