That is a wonderful act done on their part to save the planet. Recycling water is a noble cause plus it is easy on our pockets too. Just imagine if you don't have to pay for water for gardening purposes; hence recycling water is a viable option. I have checked here some simple procedures of recycling water with your existing systems in your garden - http://www.rosebudmag.com/growers/hydroponic-tips-ideas/recycling-water-in-grow-room-never-pay-for-water-again