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When it rains, large quantities of stormwater enter Portland's combined sewer system. According to the Bureau of Environmental Services, an average house (~1,500 square feet) in Portland receives about 22,000 gallons of rainwater annually on its rooftop. As the city continues to grow, the amount of impervious surfaces increases, creating less space for rainwater to infiltrate back into the ground. Using sustainable stormwater strategies can limit the amount of rainwater entering the sewer system and preserve the valuable natural resource for use in irrigation, flushing toilets and even as potable water.
Vegetative or green roofs
Rainbarrels, cisterns and flushing toilets
Vegetative ditches that collect rainwater
Managing runoff on the surface and at its source
How your business can cut its water, sewer, energy, and chemical costs by implementing water conservation projects
Step by step instructions
Community project grants, educational workshops, technical assistance, watershed council organizational development and informational resources
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