Population & Service Area

Columbia South Shore Well Field

Portland is fortunate to have a reliable and high quality supplemental source of water.
Seasonal Water Supply Planning

We plan for seasonal changes in weather and long term supply planning.
Portland's regional water system map.

Communities outside the city boundary are wholesale customers.
Portland's water demand goes beyond city limits.

Our service area includes several suburb cities who are wholesale customers.

Portland's service area covers parts of Multnomah, Washington and Clackamas counties in Oregon.

The Portland water system serves drinking water to about 935,000 Oregonians, almost one-quarter of the population of Oregon. The bureau’s retail and wholesale service area is approximately 225 square miles. Of that, Portland’s current retail service area is approximately 143.3 square miles.

In 2011-12, the Portland Water Bureau directly served a population of over 566,000 people in 161,000 residential households (both single and multi-family residences) and over 19,000 commercial and industrial customers.

Portland's wholesale customers served an estimated population of more than 368,000 in 2011-12.