As rain or melting snow flows over roads, driveways and lawns, it can pick up pollutants like motor oil, fertilizers, litter and pet waste. This “storm water” that is not absorbed and filtered by the ground is not treated and usually flows into a storm drain system or directly into nearby waterbodies. This becomes storm water pollution and can be harmful to aquatic life and create human health risks.
Storm Water & Pollution Prevention (PDF)
Where does rainwater go? (Flyer)