Member Organizations Beaverton School District City of Beaverton City of Cornelius City of Forest Grove City of Gaston City of Gresham City of Hillsboro City of North Plains City of Sherwood City of Tigard City of Tualatin Clackamas River Water Clean Water Services Hillsboro School District Oak Lodge Water Services Oregon Department of Transportation Raleigh Water District Sunrise Water Authority Tigard-Tualatin School District Tualatin Hills Parks & Recreation District Tualatin Valley Fire & Rescue Tualatin Valley Water District Washington County West Slope Water District