With a grant from the 2012 Solutions Generator, a group of students built an indoor greywater system for Field Work, a community classroom and art space that is collectively run by masters students in Art and Social Practice at PSU. For the last two years, the sink at Field Work has not functioned properly and empties into a bucket that is poured down the toilet when full. The students' solution uses mushrooms to filter the wastewater and plants to transpire the water into the air. While most greywater systems pipe water into outdoor landscaping, this building required an innovative indoor solution. You can read their plans to build your own indoor greywater system (pdf).