By design, the San Francisco Public Utilities Building is exceedingly green. It opened in 2012 and for years the building has been recycling its wastewater for things like flushing the toilets. Now, that water can be consumed.

“Everything that’s connected in this room to the transparent pipe is part of our research project,” explains Manisha Kothari, Project Manager for the SFPUC.

Down in the bowels of this building that houses some 900 employees, you will find the equipment that treats all of their wastewater.