Bio-Retention Services

The purpose of a Bio-Retention System is to slow the flow and filter pollutants from runoff before it reaches our groundwater, seeps into the municipal sewer system or discharges into our waterways. Sometimes referred to as Bioswales, Vegetative Swales or Rain Gardens, these landscape features are specifically designed to enhance the appearance of an area while acting as an integral element of stormwater management. Bio-Retention Systems can be utilized in small residential applications as well as on large commercial projects.

How it Works:

  • Surface runoff is directed into shallow, landscaped depressions. These depressions are designed to incorporate many of the pollutant removal mechanisms that operate in forested ecosystems.
  • During storms, runoff puddles above the mulch and soil in the system. Runoff from larger storms is generally diverted past the facility to the storm drain system.
  • The remaining runoff filters through the mulch and prepared soil mix.
  • The runoff can be collected in a perforated underdrain and returned to the storm drain system.


  • A wide variety of available plants for an attractive and functional landscape feature.
  • Mulch layer catches sediment, binds heavy metals, and digests organic pollutants.
  • 3 – 4 feet of soil anchors plant roots, provides water and nutrients and further remediates contaminated stormwater.
  • 6-8” gravel layer and underdrain transports clean stormwater to existing infrastructure.

Our highly trained staff can provide the expertise required to install storm water bio-retention systems to deal with surface water runoff in compliance with rapidly changing regulations. Contact us to learn how we can help today!

Contact Us