I was wasting about 60% of water made on our meter, and using about 800 litres a week pure water. The waste water is great for keeping your lawn green!

I used the same argument with the water company, severn trent/welsh water about not disposing of it, but needed to get a seperate meter fitted by them, but apparently can cost more, as business rates are more, but cannot confirm that last part, as we were renting and wasnt going to fit a separate meter.
I was paying £60 a month. But got a couple of hundred pounds in credit. I went to £40 and still was in credit. That was with welsh water. So not as bad as was expecting.