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Portland Water Bureau

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


1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Seasonal Water Supply Planning

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.

November 3, 2015 Update: Recent rains in the Bull Run Watershed have ended the drawdown of the Bull Run Reservoirs. A long dry season in 2015 saw a record period of reservoir drawdown and the use of groundwater to supplement the Bull Run supply since July 16th. The Bull Run Reservoirs are now nearly full, which will allow the Portland Water Bureau to resume using the Bull Run supply to meet 100% of system demands beginning November 4th. The expected wet season weather should keep the Bull Run reservoirs at or near capacity until summer 2016.  


Usable Storage - Portland's Bull Run Reservoirs have 16.8 billion gallons of total storage; of that, 9.9 billion gallons are considered usable for drinking water.

Average Daily Storage - The average amount of usable drinking water storage on a daily basis using historical data from 1976-2014

Lowest Daily Storage - The lowest daily level of usable drinking water storage from 1976-2014. 

Summer Supply Plan Update

November 13, 2015

Water Efficiency Information

Information about ways to use water wisely.