PWTB 200-1-149 Demonstration of a Modular Wetland Treatment System for Stormwater Runoff  


The purpose of this Public Works Technical Bulletin (PWTB) is to document the testing and evaluation of a commercially available Low Impact Development (LID) technology, “Modular Wetlands™” (MWS), to slow down and treat stormwater runoff, thus preventing contaminant migration to surface water. This report describes the performance of the technology over 1 year and evaluates the effectiveness of the technology to provide a treatment train for a high-use paved area with heavy pollutant loads. It also includes results of the treatment system for in situ treatment of Petroleum, Oils, and Lubricants (POL), heavy metals, and suspended solids from polluted stormwater runoff, along with maintenance requirements for the system.