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Downspout Disconnection
Disconnecting downspouts from the sewer system allows roof water to drain to lawns and gardens. It’s a more natural way to manage roof runoff because it allows water to soak into the ground as plants and soils filter pollutants.
A large part of Portland has a combined sewer system that carries sewage and stormwater runoff in the same pipes. When it rains, the combined sewers fill to capacity and some of the stormwater and sewage mixture overflows to the Willamette River.
Downspouts on many homes are connected directly the combined sewer system and roof runoff from those homes contributes to combined sewer overflows (CSOs). Disconnecting those downspouts reduces the amount of water entering the system and reduces CSOs.
Downspouts must be disconnected safely to protect people and property. Because sites vary, downspout disconnection is not a recommended option in every situation. Follow the safety guidelines and city standards found on this site, and for questions please click here to send us a message or call 503-823-5858.
Every downspout counts. Even when it’s not possible to disconnect every downspout on every home, remember that even one disconnected downspout can redirect thousands of gallons of stormwater every year. | |
