Agreed but that a replacement isn&#x27;t perfect is not sufficient reason not to do it if the replace is better.<p>If the concern is that municipal water standards are too low to do this then the solution is to push for higher standards.<p>The pressure on water supply in many regions is only going to get worse and more efficiently recycling waste water can make a significant difference.<p>Additionally if the standards are so low as to make grey water a risky proposition then they are simply too low generally, water from reservoirs can also be very polluted with things like agricultural run off.