Graywater reuse can play an important role in achieving 100% reuse for toilet flushing and irrigation in many commercial projects. Graywater flows are consistent both seasonally and during occupied days of the week. This flow can then be combined with additional variable water sources such as rain, storm, condensate, or cooling tower blow down. The GRAYWORKS system can be customized to integrate multiple water sources to achieve LEED or Living Building Challenge goals.