Its not worth your effort to just piss off your town. Do the math yourself. Weight a load of clothing an wash it, when it comes out wet weigh it and by difference you will know how much water does not go down the drain. No calculate how much water the machine uses on a full cycle. What you will find is there is very very little water that actually gets evaporated and does not go down the drain.
Your efforts would be much better spent on other things, like getting just one extra customer into your store each day.