Water that falls during a rainstorm or comes from melting snow is stormwater. In Kirkland, we have many hard surfaces, called impervious surfaces, that do not allow water to soak into the ground naturally. When stormwater falls on hard surfaces like roads, parking lots, rooftops, and driveways it cannot soak in and becomes stormwater runoff.
Stormwater runoff picks up pollutants like oil, chemicals, fertilizer, pet waste, soap, and others and carries them to the nearest storm drain. In Kirkland, all storm drains lead to the nearest creek, wetland, or Lake Washington, which means polluted stormwater runoff harms our water quality. Stormwater runoff is not cleaned or filtered before it reaches our waterways.
Stormwater runoff quickly runs off developed land during the rainy season. As a result, this water can cause flooding of homes, businesses, and roads. Stormwater also floods and harms streams and wetlands needed for fish and other wildlife habitat.
Learn how you can keep stormwater clean and prevent water pollution
Manage drainage and flooding around your property
Prevent pollution and erosion from construction and development