Which type of technology is commonly used to treat stormwater runoff?

Bioretention cells are a type of green infrastructure that effectively manages and treats stormwater runoff. They are designed to mimic natural processes by using soil and plants to filter pollutants from water before it is released into the environment. These systems capture runoff, allowing it to percolate through a mixture of compost, soil, and gravel, which helps to remove sediments, heavy metals, nutrients, and other contaminants.

The vegetation in bioretention cells not only aids in the filtration process but also helps in absorbing excess water, thus reducing the volume of runoff. This method enhances water quality while promoting ecological benefits, such as habitat creation and improved aesthetic appeal in urban areas. Bioretention cells are particularly effective because they incorporate both biological and physical treatment processes, making them a popular choice for stormwater management in various settings, including residential, commercial, and municipal applications.