In an average year, over 300 billion gallons of rain falls on the Winnipesaukee watershed. Much of that gravitates to the lake, a reserve with over 670 billion gallons, then heads down the Merrimack River to the sea, continuing the water cycle. The supply of drinking quality ground water is a different issue, but the lakes region is not hurting for the quantity of fresh water. Using a few thousand gallons for what ever you want, especially if taken from surface water, is OK. Just please return it when you are done.