Gray water is the wastewater from bathroom sinks, showers/bathtubs, and clothes washers/laundry tubs. This water usually goes to the public sewer system with other household wastewater.
A gray water system lets you reuse that water on your landscape or your home's foundation. It can also help to lower your water bills since you will be paying for water once but using it twice.
Austin Water is owned and operated by the City of Austin.