Streets are a significant source of pollutants. Street sweeping protects waterways by reducing pollutants before they blow or wash off streets to our waters.

Trees are a critical part of Seattle’s infrastructure. Trees help manage stormwater and improve water quality. Trees also provide many benefits beyond stormwater management including making people happier and healthier, providing food and habitat, store carbon, cleaning the air, cooling the city, and making the city beautiful.

Wetlands help manage flooding, protect water quality, and provide critical habitat. Over time, many wetlands have been destroyed or damaged by development and other activities.