Greywater Action’s business directory is an excellent resource that lists people across the US that have completed Greywater Action’s hands on training. The DEQ Water Quality Permits Database can display who has previously received greywater permits. Under ‘Permit Criteria’ select GEN 2401 or GEN 2402.
In the Portland and Ashland area there’s: Jonathan Brandt of Portland Earth Care portlandearthcare at gmail dot com.
For examples of indoor greywater reuse in Oregon, look to Bud Clark Commons, People’s Food Co-op, First Alternative Co-op, Hassalo on Eighth, and OHSU’s Collaborative Health Science Building. Note that both Food Co-ops have taken down their graywater reuse systems because of clogging problems.