Welcome to the Joint Water Commission

welcome-imageThe Joint Water Commission (JWC) is the primary drinking water supplier in Washington County, Oregon, and is responsible for treating, transmitting, and storing potable water for more than 365,000 customers.

Four agencies share ownership in the JWC – Cities of Hillsboro, Forest Grove, Beaverton and the Tualatin Valley Water District (TVWD).  The JWC also wholesales water to the City of North Plains. 

Drop_Graphic Visit the City of Hillsboro Project Website to see current projects available for bid.


JWC Water Treatment Plant (WTP) recognized as “2016 Outstanding Performer” by State of Oregon

Picture of Certificate
Outstanding Performer 2016

The JWC WTP was rated by the State of Oregon Health Authority (OHA) as an “Outstanding Performer.” Outstanding performers are water treatment plants with no significant deficiencies identified, and no unresolved violations. (JWC had no violations, period.) Water treatment plants with outstanding performance ratings are able to reduce regulatory State Water System Surveys from once every three years to once every five years.  Congratulations to JWC water operators and staff for a job well done! 


JWC Promotes Life Jacket Safety in the Tualatin Watershed at Hagg Lake


Every summer, the Joint Water Commission (JWC) partners with Safe Kids Washington County to provide child and toddler-sized personal flotation devices (PFDs) at a water safety kiosk at Hagg Lake.  The PFDs, or life jackets, can be borrowed for free by parents for their children while they play in the lake.  When a child finishes with water activities, the PFD is returned to the kiosk for another child to use another day.  The JWC participates in the program as part of its dedication to stewardship and water safety at Hagg Lake and in the Tualatin Watershed.