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Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.


MAILING ADDRESS: 1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Seasonal Water Supply Planning

  • Bull Run Reservoirs Store 9.9 Billion Gallons of Drinking Water.

  • Portland's secondary source of high quality groundwater can be used to supplement summer demand when needed

Each year, the Portland Water Bureau develops a Seasonal Water Supply Augmentation and Contingency Plan. This plan evaluates the availability of water from the Bull Run and groundwater sources, projected weather forecasts, and water demands to guide management of the drinking water system. Between careful management and the region’s strong conservation efforts, PWB is prepared to meet the range of potential supply and demand conditions that could occur in the Portland water system this season.

On June 22, 2017 the Bull Run Reservoirs began drawdown, the period when drinking water system demand and flows to the lower Bull Run River are greater than the water flowing in to the reservoirs. As of August 31, 2017 there was approximately 4.8 billion gallons of usable storage in the Bull Run reservoirs (48% full). At this point the Portland Water Bureau does not anticipate the need for additional drinking water from the Columbia South Shore Well Field in 2017.


2017 Demand and Consumption

October 9, 2017

Water Efficiency Information

Information about ways to use water wisely.