Replacing impervious material with permeable pavement is a newer method of managing stormwater and its negative effects. Stormwater runoff includes both rain and water from other sources (e.g., landscape watering and home car washing). Stormwater absorbs pollutants such as oil, fertilizers and other chemicals from impervious surfaces such as rooftops, driveways, sidewalks and roads. The water is not treated, and most runoff is directed into the city’s storm system of drains, ditches and pipes and eventually discharged into local waterways. Some of our local waterways—Clarks Creek and the Puyallup River, to name two—are native salmon habitats.
Permeable pavement is an effective way to retain stormwater on-site and keep it from carrying toxic material into our waterways. Managing stormwater where it originates also helps reduce the chance of localized flooding.