thanks to mike and dawn for the reply
i agree with you 100%.it is important to us that we have this system in place from an environmetal point of view.water was always going to be an issue in this area and having a desalination plant will guarantee a sustainable and regular supply not just for our pw developments but for the rest of the population in the murcia area.
thanks for your input.i will try to find out more info and see if i can find the place when we go out for our completion at the end of september.
best wishes
ann and tony,naranjos garden 7.