Where I live (Tacoma WA if anyone wants some) there are wellheads you can go to and get water for free. I use it for brewing beer (because of the mineral content). I've never seen anyone else filling. I was curious so I asked, and they measure how much water people take and it's only in the hundreds of gallons a month per wellfield. There has to be over 200,000 people within five miles of one of these wellheads.