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Filterra is similar to bioretention in its function and application, but has been optimized for high volume/flow treatment and high pollutant removal. Its small footprint allows it to be used on highly developed sites such as landscaped areas, parking lots and streetscapes. Filterra is exceedingly adaptable and can be used alone or in combination with other BMPs.
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Stormwater runoff enters the Filterra system through a curb-inlet opening or pipe and flows through a specially designed filter media mixture contained in a landscaped concrete container. The filter media captures and immobilizes pollutants; those pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra system’s micro/macro fauna and flora. Stormwater runoff flows through the media and into an underdrain system at the bottom of the container, where the treated water is discharged.
| Features | Benefits |
|---|---|
| High media flow rate (up to 175" per hour) | Reduced footprint compared with traditional bioretention |
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Third party field testing confirmed that Filterra meets state regulatory requirements for pollutant removal under TAPE and TARP testing |
Regulatory Compliance |
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Filterra offers the most cost effective stormwater treatment system featuring low cost, easy installation and simple maintenance |
Value |
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Landscaping enhances the appearance of your site making it more attractive while removing pollutants |
Adds aesthetic appeal to your site |
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Available in multiple configurations and sizes |
Flexibility to meet site-specific needs |
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No confined space access, and activation is included with the purchase of every system |
Simple and easy maintenance |
At the heart of all Filterra systems is Filterra engineered media; a specified gradation of washed aggregate and organic material homogeneously blended under strict quality controlled conditions. The filter media has been optimized to operate under high flow rates (up to 175 inches/hour) while maintaining pollutant removal performance. Filterra media is tested for hydraulic functionality, fertility, and particle size distribution to ensure uniform performance.
| MEASURED POLLUTANT REMOVAL PERFORMANCE | |||
| Pollutant | Median Removal Efficiency | Median Effluent Concentration (mg/L) | Third Party Reference Studies |
| Total Suspended Solids | 86% | 3.3 | UVA 2006, Herrera 2009, Herrera 2014, NC State 2015 |
| Total Phosphorus (TAPE) | 70% | 0.05 | Herrera 2014, NC State 2015 |
| Total Nitrogen | 34% | 0.54 | NC State 2015 |
| Total Copper | 55% | 0.004 | UVA 2006, Herrera 2009 |
| Dissolved Copper | 43% | 0.003 | Herrera 2009 |
| Total Zinc | 56% | 0.04 | UVA 2006, Herrera 2009, NC State 2015 |
| Dissolved Zinc | 54% | 0.1 | Herrera 2009 |
| Total Petroleum Hydrocarbons | 87% | 0.71 | Herrera 2009 |
The information above is based on results from third-party field studies following industry-recognized protocols such as TAPE and TARP. Relevant studies are noted for each pollutant, and corresponding data was aggregated to provide realistic and repeatable performance expectations.
Some jurisdictions recognize higher removal rates - see your Contech Stormwater Consultant for performance expectations.
Filterra is approved through numerous local, state and federal verification programs, including:
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Technical information for this product is located in the technical guide’s section.
The Filterra Offline configuration is the most economical and simplest Filterra configuration. It utilizes a downstream catch basin or curb inlet for bypass flows allowing for the shallowest profile and most flexible design of any of the Filterra configurations. It is ideal for both new and retrofit projects.
The Filterra Peak Diversion provides treatment and high-flow bypass in one structure, eliminating the need for an external bypass structure. This configuration also allows for multiple inlet options, including curb inlets, pipe inlets, and grate inlets.
The Filterra Internal Bypass Curb incorporates a curb inlet treatment chamber and internal high flow bypass in a single structure. This eliminates the need for a separate bypass structure and enables placement in a “sag” or “sump” condition.
The Filterra Sediment Chamber includes a pretreatment sediment chamber that provides a settling area for large debris and sediment prior to water entering the media bay.
The Filterra Bioscape Vault utilizes an open top configuration and downstream catch basin or curb inlet for bypass flows allowing for a shallow profile. Internal Bypass configurations are also available in some locations.
The Filterra Bioscape Vault Basin allows for a vault based system to be fully integrated into the landscape. Multiple inlet options are available via the side slopes, including sheet flow. Bypass is typically achieved via an upstream structure.
The Filterra Bioscape utilizes all of the Filterra components, but without the concrete structure, allowing for multiple inlets and installation directly into a basin. Bypass is achieved via an upstream structure.
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