If you own a car, maintain it so it does not leak oil or other fluids. Be sure to wash it on the grass or at a car wash so the dirt and soap do not flow down the driveway into the nearest stormdrain.
Dispose of all trash in a can and pick up debris on the ground. Do not litter!
Never apply fertilizers or pesticides before heavy rain. If fertilizer falls onto driveways or sidewalks, sweet it up instead of hosing it away.
Keep lawn and household chemicals tightly sealed and stored where rain cannot reach them. Dispose of old or unwanted chemicals at household hazardous waste collection sites or events.
Mulch leaves and grass clippings or place in bags at the curb.
Turn your gutter downspouts away from hard surfaces, seed bare spots in your yard to avoid erosion and consider building a rain garden in low lying areas of your lawn.
Pet owners should pick up after their pets and dispose of pet waste in the garbage.