Water

Trees have a positive effect on water quality. Their roots hold soil in place, and their canopies prevent erosion by slowing the force of falling raindrops. Trees intercept and store rainwater, delaying runoff volume, and reducing peak flows and flooding. Tree root growth and decomposition improve compacted soils, enabling the ground to absorb more water and replenish groundwater.

Stormwater runoff from impervious surfaces such as parking lots, streets and roofs has an enormous negative impact on water quality. Removing asphalt and installing an alternative like grass or gravel is the most effective stormwater management technique. When that is not practical, planting trees is always an excellent option. Planting and maintaining healthy trees over impervious surfaces slows runoff and helps to prevent polluted water from reaching our streams and rivers. Local and nationwide studies demonstrate that trees can improve stormwater management more cost-effectively than traditional engineering solutions.