Compost your leaves. It's the surest way to keep them out of the streets and storm drains, and thus, out of the wetlands, lakes and streams. Chop your leaves with a power mower. A fine layer of chopped leaves provides nutrients to your lawn. Use leaves around rose bushes and landscape plants.
Leaves make an excellent winter mulch.
Bag your leaves for pick-up. Fertilizer may be necessary for your lawn's health. However, the nutrients in fertilizer can be harmful to the water ecosystem. Applying the right fertilizer, in the right amount, ensures healthier lawns and water bodies. Have your soil tested.