Customer Service: 503-823-7770
GENERAL INFORMATION: 503-823-7404
The Portland Water Bureau operates a well field capable of producing close to 100 million gallons per day of high quality drinking water. The Columbia South Shore Well Field (CSSWF) is the second largest water source in the State of Oregon, with about half of the daily capacity of Portland’s Bull Run source. Groundwater from the CSSWF is used as a secondary source for customers served by the Bull Run supply and also provides supplemental supply during the summer high demand season.
The Columbia South Shore Well Field:
To access groundwater, wells are drilled into aquifers. Portland groundwater supplies are tapped from three regional aquifers.
Groundwater development and list of when groundwater has been used as a water supply source.
Free groundwater events for the public.