Customer Service: 503-823-7770
GENERAL INFORMATION: 503-823-7404
The region will experience annual and seasonal climate variability, even as the climate continues to warm over the next several decades (Click image for National Climate Assessment).
Climate models project a warmer future Northwest with drier summers, wetter winters and heavier rainfall during storm events (Click image for Climate Change in the Northwest report).
Portland’s water system is expected to continue meeting customer needs into the future, based on 30-year population and demand projections, and water efficiency.
The Bull Run reservoirs draw down during the late spring or summer, and refill in the fall (Click image for Summer Supply Planning information).
Portland's groundwater supply increases the water system’s resilience to climate change (Click image for groundwater information).
Portland's drinking water reservoirs in the Bull Run Watershed refill from seasonal rainfall. The water supply is therefore less vulnerable to loss of snow from warming temperatures.
Warmer air temperatures are expected to reduce snowpacks and affect water quality for fish.