Hi Guy's
I'm a bit green to all this water production at the moment, but isn't all your water purification done behind closed doors?
and when you go to customers houses doing wfp, your not actualy useing a hose pipe connected to the mains,
Tell them a little white lie, that you get all your water from a well at the bottom of your garden, and that it cost you £1,500 for an extraction licence, or you buy it in.
Like I said I'm a bit green to your problems, and I don't have a problem with a water drought Living in the south east.
If I can help in any way then give me a shout.
But be gentle with me not understanding you problems properly.