Protecting our streams starts at home

Many people assume that water flowing down a storm drain is treated before it reaches natural waterways. In reality, storm drains in our communities often flow directly into nearby streams, wetlands, and lakes — carrying everything in that water along with it.

When cars are washed on driveways or paved surfaces, the runoff can contain soap, oil, grease, dirt, heavy metals, and other pollutants that wash straight into the stormwater system. Even soaps labeled “biodegradable” can still harm fish and aquatic life when they enter streams untreated. Pressure washing driveways, sidewalks, patios, and parking areas can create similar problems.

These pollutants can:

• Harm fish and aquatic insects

• Reduce water quality

• Increase algae growth

• Damage habitat for wildlife

• Pollute lakes and streams used for recreation

Simple Ways You Can Help

• Choose a commercial car wash

• Wash vehicles on vegetation for natural infiltration of toxins

Small Actions Make a Big Difference

For more information: www. sammamish.us/our-community/environment-sustainability/help-keep-clean/car-care/